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OBD-II Trouble Codes Lookup

When your check engine light or other warning light illuminates, it typically means that your vehicle's OBD-II system has detected a problem and stored a diagnostic trouble code (DTC). With our categorized car codes, you can easily identify what triggered your malfunction light, understand the causes and symptoms of each problem, and find effective repair solutions for your car or truck. Quickly look up OBD codes list and get diagnostic and repair help!
Jump to 0BD 2 Code Search

What Are OBD-II Trouble Codes?

OBD-II trouble codes, also known as diagnostic trouble codes (DTCs), are standardized codes stored by the vehicle's onboard computer when it detects a problem. Every car and truck manufactured in the United States after 1996 is equipped with an OBD-II system.

This system monitors the engine, emissions, and other critical systems. When a sensor or system malfunctions, the OBD-II system triggers the Check Engine Light (CEL) and records a specific fault code.

Understanding OBD-II Codes: What Each Character Means

When your "check engine light" or other dashboard warning light illuminates, your vehicle's OBD-II system generates one or more DTCs. Each DTC is a five-digit alphanumeric automotive diagnostic trouble code (e.g., P0420) that describes the type of fault, system location, and specific issue.

These engine codes typically begin with a letter and are categorized into four types based on the prefix:

First Character: System Category

P-Codes (Powertrain)

Engine and transmission systems

C-Codes (Chassis)

Suspension, brakes, steering

B-Codes (Body)

Interior systems like airbags or climate control

U-Codes (Network)

Communication issues between modules

Second Digit: Code Type

The second character in the code tells you whether the fault is generic or manufacturer-specific:

0 = Generic code (SAE-compliant, applicable to all brands)

1 = Manufacturer-specific code

Third Digit: Vehicle System Category

The third digit pinpoints which system is affected. There are eight categories:

0 = Fuel and air metering and auxiliary emission controls

1 = Fuel and air metering

2 = Fuel and air metering (injector circuits)

3 = Ignition system or misfire

4 = Auxiliary emission controls

5 = Vehicle speed control and idle control system

6 = Computer and output circuits

7 = Transmission

Last Two Digits: Specific Fault

The last two digits identify the exact fault or component involved, allowing the technician (or DIY owner) to determine the precise problem.

How to Read & Retrieve OBD-II Codes

Step 1: Locate the OBD-II Port

Locate the OBD-II diagnostic port, typically located below the dashboard near the steering wheel. In some vehicles, it may also be located near the center console or behind a small cover.

Step 2: Plug in the OBD-II Scanner

Connect your OBD-II code reader to the port. Turn the ignition key to the "ON" position (without starting the engine) so that the scanner starts and communicates with the vehicle's computer.

Step 3: Retrieve Diagnostic Trouble Codes (DTCs)

Follow the scanner's instructions to read stored and pending codes. The results will be displayed as a five-character code. Write it down or save it for future reference.

👉 Use our OBD Code Lookup Tool to learn what each code means, common causes, and possible solutions.

How to Clear OBD-II Trouble Codes

When your check engine light comes on, an OBD-II scanner can help pinpoint the problem. But once the issue is resolved, don't forget to clear the check engine light codes to reset the light. Here are the most recommended steps:

Step 1: Plug the scanner into the OBD-II port (usually located under the dashboard).

Step 2: Turn the ignition switch to the ON position, but do not start the engine.

Step 3: Navigate to "Clear DTCs" or "Clear Trouble Codes" in the scanner menu.

Step 4: Wait for confirmation, then turn the ignition off and restart the vehicle.

👉 Pro Tip: Always diagnose and fix the underlying cause first. Clearing the OBD2 codes won't fix the problem; it will only reset the warning light.

Search OBD-II Trouble Codes Database

Quickly look up OBD codes and learn their meanings and solutions. Enter a five-character code beginning with P, C, B, or U (e.g., P0420) in the search box below to find the code.

Note: The database is still being updated, and individual code information may not yet be displayed.

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OBD Codes List

P0404 Code: EGR Circuit Range/Performance Issues Explained
Still struggling with the P0404 fault code? This OBD code indicates a problem with your EGR system. Learn what it means, why it occurs, and how to fix it.
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P20EE Code Explained: SCR NOx Catalyst Efficiency Below Threshold
Experiencing the P20EE fault code? Learn about triggering causes, diagnostics, and the best fixes for diesel trucks equipped with SCR/DEF systems.
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How to Fix P0087 Code: Fuel Rail/System Pressure Low Explained
Is your check engine light on and displaying the P0087 code? Learn the symptoms, causes, and fixes for low fuel rail/system pressure to prevent costly engine damage.
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P040D Code Explained: EGR Temperature Sensor 'A' Circuit High
This article explains the meaning of the P040D fault code, common symptoms and causes, and provides diagnostic procedures and repair recommendations to help you quickly restore diesel vehicle performance and emissions compliance.
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P1491 Code: EGR Valve Insufficient Detected Troubleshooting
Learn what the P1491 code means for Honda, Dodge, Jeep, and other vehicles. Explore the causes, repair steps, and how an EGR delete kit can prevent P1491 problems from recurring.
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P2BAC Code: How to Fix NOx Exceedance - Deactivation of EGR
Still struggling with P2BAC fault codes? Our complete guide covers diagnosis, repair procedures, and performance upgrades, including high-quality EGR flush kits from SuncentAuto.
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P1405 Explained: DPF EGR Sensor Circuit High Voltage Detected
Experiencing code P1401? This guide explains DPFE sensor failures, how to fix them, and when to consider removing the exhaust gas recirculation (EGR) system for off-road driving.
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P1401 Code: DPFE Sensor Circuit High - A Complete Guide
Seeing the P1401 code in your OBD-II scan? Learn what "DPFE Sensor Circuit High Voltage" means, how it affects your Ford, Volkswagen, Audi, or BMW vehicle, and how to fix it quickly and affordably.
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P0406 Code Fix Guide: EGR Sensor "A" Circuit High Explained
Struggling with the P0406 error code? We'll explain what it means, why it happens, and what steps you can take to fix and prevent this problem yourself.
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How to Fix P0405 Code: EGR Sensor "A" Circuit Low
Is your check engine light on with the P0405 fault code? Don’t worry, follow along as we explain what the P0405 code means, why it occurs, and how to fix it.
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p2002-code
P2002 Code Explained: DPF Efficiency Below Threshold Bank 1
Struggling with a P2002 code? Discover the root causes, repair costs, and expert tips to restore your diesel vehicle’s emissions system performance.
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How to Fix the P0403 Code: EGR Control Circuit Malfunction
Is your check engine light on with the P0403 code? Learn what it means, symptoms, causes, and how to fix this EGR control circuit malfunction problem.
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p1404-code
P1404 Code: EGR Closed Position Performance Issues Fix Guide
Is your check engine light on with the P1404 code? Learn what it means, symptoms, causes, and how to fix it yourself on Chevrolet, Dodge, Jeep, and more.
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P0402 Code Explanation - EGR Excessive Flow Detected
Learn what the P0402 code means, how it affects your engine, and how to fix it on Ford F-150, Toyota Prado, 6.7 Powerstroke engines and more.
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P0401 Code - Insufficient EGR Flow: Causes & Fixes Full Guide
Don't ignore the P0401 fault code! It means your EGR system isn't working properly. Learn what it means, symptoms, common causes, how to fix and avoid.
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P0400 Code: EGR Flow Malfunction - How to Fix and Prevent It
Learn what the P0400 code means, why your vehicle triggers it, and how to fix it. This guide includes DIY tips, repair costs, and prevention tips.
Read More

p246c-code
P246C Code: How to Fix DPF Restriction Forced Limited Power
Is your vehicle in limp mode due to a P246C code? Learn why this DPF-related fault occurs, how to diagnose it, and step-by-step fixes to restore engine power.
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p2463-code
P2463 Code Explained: Fixing DPF Soot Accumulation Fast
Struggling with a P2463 code? Learn why DPF soot accumulation happens, how to fix it, and prevent future issues. Get step-by-step solutions now!
Read More

P2453: DPF Pressure Sensor "A" Circuit Range/Performance
Learn what P2453 means, why it occurs, and what solutions experts recommend. Use these practical tips to keep your diesel engine running efficiently.
Read More

p2452-code
P2452 Code: How to Fix DPF Pressure Sensor "A" Circuit
Encountering the P2452 trouble code? Learn what it means, common symptoms, causes, and step-by-step solutions to resolve this DPF sensor issue.
Read More

If P1489 shows up, there's a fault in the PCV heater's control circuit-this can stop the heater from working entirely. It's often due to a damaged control module, wires that cut out occasionally, or a heater with resistance outside the normal range (2-10Ω). Replace the damaged control module first. Then, fix any wires that cut out, and measure the heater's resistance to make sure it's within the standard range.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

Encountering P0439 implies a fault in the catalytic heater control circuit in Bank 2. The causes might be an abnormal heater resistor, a relay fault, or an ECU control module failure. Measure the heater resistance (it should be 2–10Ω). Replace the heater relay and test the ECU drive signals.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Fault code P1480 means the PCV solenoid valve has an open or closed circuit-this valve controls flow in the PCV system, so a circuit issue stops it from working. Common causes are a broken coil in the solenoid, worn wire harnesses, or corroded connectors. First, check the solenoid's resistance (it should be 3-5Ω) to confirm the coil issue. Then, replace worn harnesses and clean corroded connectors.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

If your vehicle triggers fault code P051A, it means the crankcase pressure sensor's circuit isn't working right-this sensor monitors pressure in the crankcase, so a faulty circuit can throw off readings. Common issues behind this are a broken sensor, damaged wires or connectors, or a vacuum leak messing with the sensor's data. To fix it, start by replacing the bad sensor. If that doesn't help, repair any damaged circuits or connectors, and seal up any vacuum leaks you find.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

Fault code P051B points to a problem with the sensor circuit's range or performance-this means the sensor isn't sending signals that fall within the normal range. Why might this happen? It could be a faulty sensor, corroded or broken wires, or a blocked PCV system (or mechanical issue) causing too much pressure. First, replace the sensor. If the issue lingers, fix the damaged circuits and either clean the PCV system or check the engine for mechanical problems.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

When P051C pops up, the sensor circuit has too low voltage-this stops the sensor from working properly. The main causes here are a sensor with an internal short, a wire that's grounded incorrectly, or a failing PCV system. Begin by swapping out the sensor. Next, repair the ground circuit to fix the voltage issue, and take a look at the PCV valve and hoses to make sure they're in good shape.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

P051D means the sensor circuit has too high voltage, which can disrupt the sensor's ability to send accurate data. This is often due to a short in the sensor's signal wire, a wire that's accidentally connected to power, or too much blow-by (gases leaking past pistons) causing weird pressure. Replace the sensor first. Then, separate the signal wire from power sources, and check the piston rings to stop excess blow-by.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

Fault code P051E is an intermittent issue with the sensor circuit-this means the problem comes and goes, not staying constant. It's usually from a sensor with bad contact, a loose connector, or a vacuum leak that fluctuates. Replace the sensor to fix poor contact. After that, make sure the connector is tight, and check the intake manifold for leaks that might come and go.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

If you see P051F, the PCV filter is clogged-this filter keeps debris out of the PCV system, so a clog can block airflow. What causes it? Sludge or debris buildup in the filter, a collapsed PCV hose, or a stuck PCV valve. Start by replacing the clogged filter. Then, swap out any collapsed hoses, and either clean the stuck PCV valve or replace it if cleaning doesn't work.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

P052E signals a performance problem with the PCV regulator valve-this valve controls pressure in the PCV system, so poor performance throws off pressure. The issues here are usually a valve stuck due to mechanical problems, a blocked ventilation pipe, or a circuit with bad contact. Replace the stuck regulator valve first. Then, clean out any blocked ventilation tubes, and fix any loose or damaged electrical connections.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

P120B indicates the PCV diagnostic valve has too low input voltage-this valve helps diagnose PCV issues, so low voltage ruins its accuracy. Why? The valve itself might be broken, the power line has too much resistance (slowing voltage), or the ECM (engine control module) is sending bad signals. Replace the faulty diagnostic valve first. Then, check the power line for resistance issues, and update the ECM software if needed.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

When P053A appears, the PCV heater's control circuit is open-this heater keeps the PCV system from freezing, so an open circuit stops it from working. The causes are often a blown heater fuse, a bad relay, or a control module that isn't outputting power. Test the heater's continuity first to check for a fuse issue. Then, replace the bad relay, and check if the control module is getting power.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

P053B means the PCV heater's control circuit has low voltage-this makes the heater work poorly or not at all. It's usually from a heater with a partial short, a wire shorted to ground, or an ECM that can't supply enough power. Replace the faulty heater first. Then, fix any wires shorted to ground, and test the ECM to make sure it's outputting enough current.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

Fault code P053C points to high voltage in the PCV heater's control circuit-this can damage the heater or other parts. The main issues are a heater with an internal open, a broken control line, or abnormal reference voltage from the PCM (powertrain control module). Replace the heater first to fix the internal open. Then, repair the broken control line, and check the PCM's signal for normal voltage.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

P145E is a fault in the PCV heater 'B' circuit-this auxiliary heater helps the main heater, so a fault here affects cold-weather performance. Causes include a broken auxiliary heater, damaged bypass control wires, or ECM communication issues. Replace the faulty auxiliary heater first. Then, repair any damaged bypass wires, and update the ECM firmware to fix communication problems.
If common repairs can't solve it, a PCV Delete Kit offers a lasting solution.

When fault code P0420 pops up, it indicates that the catalytic system efficiency in Bank 1 is below the threshold. This could stem from a clogged or failed three-way catalytic converter, faulty front or rear oxygen sensors, exhaust pipe leakage, or poor fuel quality or leaded gasoline contamination. To fix it, start by checking for and repairing exhaust leaks. Then, test the oxygen sensor data stream and replace any faulty sensors. You can also clean the catalytic converter with a specialized cleaner like a solvent solution. If cleaning doesn't work or the carrier is melted, replace the OEM catalytic converter.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Fault code P0430 signals that the catalytic system efficiency in Bank 2 is below the threshold. Likely causes include a failure of the second-row catalyst, a corresponding oxygen sensor fault, or engine misfire or an overly rich mixture. First, confirm the damage and replace the faulty second-row catalytic converters. Then, replace out-of-tolerance oxygen sensors. Also, inspect for misfire causes like spark plugs or injectors and address rich mixture issues.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Spotting fault code P0426 means there's an issue with the catalytic temperature sensor circuit range or performance in Bank 1. The main culprits are temperature sensor damage, sensor circuit short or open, or an ECU signal processing error. Your first move should be to replace the faulty temperature sensor. Next, inspect the wiring harness and connectors. If needed, update or reprogram the ECU software.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

When P0436 shows up, it's a sign of a problem with the catalytic temperature sensor circuit range or performance in Bank 2. Possible reasons are a Sensor 2 fault, circuit corrosion or poor contact, or exhaust leakage affecting temperature measurement. Replace the second-row sensors first. Then, repair any damaged circuits. Finally, seal up exhaust leak points.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Fault code P0427 indicates low voltage in the catalytic temperature sensor circuit in Bank 1. This can be due to an internal short circuit in the sensor, poor grounding, or a signal line to ground short circuit. Test the sensor resistance and replace abnormal components. Repair the grounding line and check for insulation damage on signal lines.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

If you come across P0437, it means low voltage in the catalytic temperature sensor circuit in Bank 2. It's probably caused by a sensor fault, wiring plug corrosion, or an ECU power supply abnormality. Replace the sensor right away. Clean or replace the plug and test the ECU output voltage.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Fault code P0428 points to high voltage in the catalytic temperature sensor circuit in Bank 1. The common causes are a sensor signal line to power short circuit, ECU failure, or a sensor internal open circuit. Check if the wiring harness is in contact with the 12V line. Replace the sensor and test the ECU reference voltage.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

When P0438 appears, it shows high voltage in the catalytic temperature sensor circuit in Bank 2. The likely reasons are sensor failure, circuit open, or electromagnetic interference. Replace the sensor first. Repair broken circuit points and check the ignition coil shielding.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Fault code P0434 means the catalytic temperature in Bank 2 is below the threshold. It may be because the catalyst isn't reaching the operating temperature, there's a temperature sensor deviation, or frequent cold engine starts. Check the catalytic converter insulation. Calibrate or replace the temperature sensor and investigate cooling system failures.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Fault code P0429 signals low catalytic heater efficiency in Bank 1. This can result from heater aging, insufficient supply voltage, or catalyst physical damage. Replace the catalytic converter assembly (with an integrated heater). Check the generator output voltage and look for exhaust pipe impact deformation.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

When P0432 pops up, it means the main catalyst reaction in Bank 2 is insufficient. The possible factors are catalyst carrier fracture, lead or sulfide poisoning, or long-term low-temperature operation. Replace the catalytic converter and use unleaded gasoline. Clean the fuel system and avoid short trips.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Fault code P043D indicates a high catalytic temperature sensor circuit in Bank 2, Sensor 2. The causes could be a sensor short circuit, an abnormal ECU reference voltage, or long-term low-temperature operation. Replace the sensor. Test the ECU A/D conversion module and try to avoid short trips.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

Fault code P043C shows a low catalytic temperature sensor circuit in Bank 2, Sensor 2. It's usually due to a sensor ground fault or a signal line open circuit. Repair the grounding line first. If needed, replace the sensor assembly.
If the fault code keeps returning, a CAT Delete Kit may stop it permanently.

If you encounter the fault code P1405, it means detected high voltage in the DPF EGR sensor circuit. The likely causes include DPF EGR sensor failure, sensor circuit wiring/connector issues, or ECM (engine control module) failure. To resolve this, replace the DPF EGR sensor (if voltage exceeds limits), repair or replace damaged wires or connectors, and replace the ECM when necessary.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

When P2003 shows up, it indicates DPF efficiency below threshold (bank 2). Possible culprits are excessive DPF soot accumulation leading to regeneration failure, differential pressure sensor failure, or DPF upstream/downstream exhaust leak or damage. Try a forced regeneration with a scan tool to clear soot, replace the differential pressure sensor with abnormal readings, and repair or replace damaged exhaust components.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

If you encounter the fault code P242F, it means DPF ash accumulation limit has been reached. The likely causes include long-term neglect of DPF cleaning or replacement, excessive oil consumption increasing ash, or a pressure/temperature sensor failure misjudging resistance. To resolve this, professionally clean or replace the DPF (after ash confirmation), replace faulty sensors (pressure/temperature), reset DPF fault codes, and verify with a test drive.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

Fault code P244A signals DPF pressure differential below threshold (bank 1). This could be due to DPF differential pressure sensor failure, a DPF upstream/downstream exhaust leak, or DPF damage, cracking, or missing parts. To fix it, replace the differential pressure sensor with abnormal readings, repair or replace leaking exhaust components, and inspect the DPF for physical damage, replacing if necessary.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

When P244B shows up, it indicates DPF pressure differential above threshold (bank 1). Possible culprits are excessive soot or ash accumulation inside the DPF, DPF differential pressure sensor failure, or an exhaust leak or blockage. Try forced DPF regeneration to clear soot, replace the differential pressure sensor with out-of-limit readings, and replace the assembly if regeneration fails or the DPF is damaged.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

If you encounter the fault code P245E, it means DPF pressure sensor 'B' circuit failure. The likely causes include DPF pressure sensor failure, wire or connector damage, or DPF blockage or damage. To resolve this, replace the sensor after testing and confirmation, repair or replace damaged wires or connectors, and clean or replace the DPF.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

Fault code P246B signals vehicle conditions incompatible during DPF regeneration. This could be due to insufficient high-speed driving, short trip driving cycles, or exhaust temperature sensor failure. To fix it, drive at high speed over a long distance to promote regeneration, replace a faulty exhaust temperature sensor, and instruct the driver on proper operation.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

When P2454 shows up, it indicates DPF pressure sensor 'A' circuit voltage too low. Possible culprits are sensor failure, wire or connector issues, or software/calibration issues. To fix it, replace the sensor after test failure, repair or replace damaged wires, and update vehicle software or calibrate.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

If you encounter the fault code P2455, it means DPF pressure sensor 'A' circuit voltage too high. The likely causes include sensor failure, wire short circuit or corrosion, or DPF blockage causing high back pressure. To resolve this, replace faulty sensors, repair or replace damaged wires, and perform regeneration or replace the DPF.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

Fault code P2456 signals DPF pressure sensor 'A' circuit intermittent failure. This could be due to sensor failure, sensor hose damage or blockage, or wire or connector issues. To fix it, replace the sensor with unreliable readings, clean or replace pressure hoses, and repair or replace damaged wires.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

When P2458 shows up, it indicates DPF regeneration duration abnormal. Possible culprits are DPF failure, exhaust system leak, or ECM issue. To fix it, replace the DPF, repair exhaust leaks, and repair or replace ECM issues.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

If you encounter the fault code P2459, it means DPF regeneration frequency too high. The likely causes include poor combustion or bad fuel quality, temperature/pressure sensor failure, DPF system failure, or intake restriction. To resolve this, clean or replace the DPF, repair or replace faulty sensors, and inspect and repair the fuel system (injectors/fuel quality).
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

Fault code P2460 signals DPF pressure sensor 'B' circuit voltage too low. This could be due to sensor 'B' failure, wire corrosion or damage, or exhaust leak or blockage. To fix it, replace the sensor after testing and confirmation, repair or replace damaged wiring, and resolve exhaust leaks or blockages.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

When P2461 shows up, it indicates DPF pressure sensor 'B' circuit voltage too high. Possible culprits are sensor 'B' failure, circuit short-circuit or damage, or DPF clogging or fault. To fix it, replace faulty sensors, repair or replace damaged wiring, and clean or replace the DPF.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

If you encounter the fault code P2462, it means DPF pressure sensor 'B' circuit intermittent failure. The likely causes include sensor 'B' failure, pressure hose damage or blockage, or circuit corrosion or loosening. To resolve this, replace the sensor after fault confirmation, clean or replace hoses, and repair wiring and secure connections.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

When P2464 shows up, it indicates DPF pressure differential below threshold (bank 2). Possible culprits are differential pressure sensor failure, exhaust blockage or leakage, or DPF over-cleaning or removal. To fix it, replace faulty sensors, repair exhaust leaks or blockages, and check DPF maintenance records.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

If you encounter the fault code P2465, it means DPF pressure differential above threshold (bank 2). The likely causes include DPF clogging (soot/ash), differential pressure sensor or circuit failure, or exhaust leakage or blockage. To resolve this, force regeneration to clear soot, replace the DPF when ash content is excessive, and replace sensors or repair wiring.
When standard repairs fail, try a DPF Delete Kit to resolve the issue for good.

If your check engine light comes on with the fault code P042E, it indicates that the EGR (Exhaust Gas Recirculation) did not reach the expected closed position. This could be due to carbon buildup in the EGR valve or channel, a failure of the EGR valve position sensor, or issues with the circuit or connector. To address this, start by cleaning the EGR valve and channels. If the problem persists, replace the faulty EGR valve or sensor, or repair or replace any damaged wiring or connectors.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

When the fault code P046C appears, it means the EGR sensor 'A' circuit has range or performance abnormalities. Possible causes include position sensor failure, circuit damage or corrosion, and EGR carbon buildup blockage. Replace faulty sensors first. If that doesn't work, repair or replace the wiring or connectors, or clean or replace the EGR valve.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

With P0407 (EGR sensor 'B' circuit voltage too low), sensor 'B' failure, circuit corrosion or damage, or PCM failure are possible reasons. Replace out-of-limit sensors, repair or replace wiring or connectors, or reprogram or replace the PCM.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

For P0408 (EGR sensor 'B' circuit voltage too high), sensor 'B' failure, circuit or connector issue, or ECU failure could be the case. Replace faulty sensors, repair or replace damaged wiring, or have a professional diagnose the ECU.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

When P0409 (EGR sensor 'A' circuit fault) shows up, position sensor failure, circuit corrosion or damage, or EGR valve assembly failure might be the causes. Replace faulty sensors, repair or replace wiring or connectors, or replace a defective EGR valve assembly.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

If P0486 (EGR sensor 'B' circuit fault) is detected, sensor or circuit failure, connector corrosion or looseness, or EGR valve carbon buildup could be to blame. Clean the EGR valve and sensors, repair or replace wiring or connectors, or replace faulty sensors or valves.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

For P0487 (EGR throttle control circuit 'A' open), control valve failure, circuit corrosion or damage, or control module failure could be the reasons. Repair or replace wiring or connectors, clean or replace sticking valves, or replace the faulty control module.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

When P0488 (EGR throttle control range or performance issue) appears, control actuator failure, circuit or connector issues, or carbon buildup affecting operation might be the causes. Replace the faulty actuator, repair or replace damaged wiring, or clean or replace carbon buildup components.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

If P0489 (EGR throttle control circuit voltage too low) occurs, control valve failure, circuit damage or contact issues, or ECM failure could be the case. Replace faulty valves, repair or replace wiring or connectors, or upgrade or reprogram the ECM.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

When P0490 (EGR motor control circuit high voltage) shows up, motor or solenoid valve failure, circuit open or short, or ECM failure might be the causes. Replace the damaged motor or solenoid valve, repair or replace wiring or connectors, or inspect or replace the ECM.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

For P140F (EGR throttle stuck), carbon buildup causing blockage, actuator or motor failure, or control circuit issues could be the reasons. Clean the throttle body and components, replace the faulty actuator, or repair or replace control circuits.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

If P040A (EGR temperature sensor 'A' circuit issue) is detected, temperature sensor failure, circuit or connector issue, or ECM signal error could be to blame. Replace the faulty sensor, repair or replace damaged wiring, or clear fault codes and road test.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

When P040B (EGR temperature sensor 2 performance issue) appears, sensor 2 failure, wire corrosion or looseness, or carbon buildup affecting performance might be the causes. Replace the out-of-limit sensor, repair or replace wiring or connectors, or clean the EGR system.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

For P040C (EGR temperature sensor 2 circuit voltage too low), sensor 2 failure, wire or connector damage, or poor grounding could be the reasons. Replace the faulty sensor, repair or replace wiring or connectors, or repair the ground connection.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

If P040E (EGR temperature sensor 2 circuit unstable) is detected, sensor 2 failure, wire damage or poor connection, or ECM failure could be to blame. Replace the faulty sensor, repair or replace wiring or connectors, or clear fault codes and road test.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

When P040F (EGR temperature sensor 'A/B' correlation fault) appears, sensor A/B failure, wiring issue, or EGR valve failure might be the causes. Repair or replace sensor wiring, replace the faulty sensor, or clean or replace the EGR valve.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

For P1402 (EGR valve stuck in open position), carbon buildup or mechanical failure, solenoid or actuator failure, or wiring issues could be the reasons. Clean the EGR valve and passages, replace the faulty valve or solenoid, or repair or replace wiring.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

If P1403 (EGR system valve 1 issue) is detected, EGR valve sticking or blocking, wire corrosion or damage, or channel or mixer carbon buildup could be to blame. Clean or replace the EGR valve, repair or replace wiring or connectors, or clean passages and the intake manifold.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

If P1406 (DPFE sensor downstream hose issue) is detected, hose rupture or blocking, DPFE sensor failure, or EGR system carbon buildup could be to blame. Replace or reattach hoses, replace the contaminated sensor, or clean the EGR system.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

When P1407 (EGR flow exceeds self-test range) appears, carbon buildup blocking the channel, EGR valve sticking, or sensor or solenoid failure might be the causes. Clean passages and valves, replace the stuck EGR valve, or replace faulty sensors or solenoids.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

For P3130 (EGR system adjustment exceeds limit), EGR valve sticking or obstruction, channel carbon buildup blocking, or position sensor or wiring failure could be the reasons. Clean the EGR valve and passages (replace if ineffective), replace the faulty sensor, or inspect and repair EGR wiring.
If regular fixes don’t work, an EGR Delete Kit can provide a permanent solution.

If your check engine light comes on while driving, it may mean the U0001 Mercury issue. This is a problem with the vehicle's high-speed CAN bus (a network for module communication). Common reasons are corrosion or damage to the wiring harness connected to the high speed can bus. To fix it, first, use a scanner to find the cause. look for signs of corrosion, damage, or loose connections.

To solve the C0010 code in your Mazda, start by checking the left front inlet solenoid valve system—this solenoid controls ABS brake fluid flow. Your ABS warning light will be on, and you may have pulsating brakes or longer stops. Causes include electrical faults, damaged wiring, a faulty solenoid, or contaminated fluid. Do a diagnostic scan, inspect the solenoid and wiring, replace faulty parts, clear the code, then test drive to ensure ABS works properly.

If you see check engine light illuminated when starting your car, it could be U0004 Ford. This code relates to a problem with the vehicle's high-speed CAN bus (a network for module communication). Likely causes: faulty high-speed can communication bus wiring. Do first, use a scanner to find the cause. use a multimeter to check the voltage levels on the high-speed can bus to pinpoint the area where the voltage is low.

To solve the U0004 problem (which is a problem with the vehicle's high-speed CAN bus (a network for module communication)), you should first, use a scanner to find the cause. test the high speed can communication bus module for proper functionality. This issue causes check engine light is illuminated and often comes from wiring or harness issues causing a short or open circuit.

Usually, this happens because damaged or rusty wiring harness. The U0003 code means a problem with the vehicle's high-speed CAN bus (a network for module communication). You may notice illumination of the check engine light. To resolve it, first, use a scanner to find the cause. use a multimeter to test the continuity of the wiring and connectors to pinpoint the location of the open circuit.

When the vehicle's CAN bus has communication problems, U0002 RAM appears. You'll likely see check engine light illuminated. It usually happens because faulty wiring: damaged or rusty wiring within the can bus system can disrupt communication between ecus. Next, first, use a scanner to find the cause. inspect wiring and connections: thoroughly inspect the wiring harnesses, connectors, and terminals within the can bus system for any signs of damage, corrosion, or looseness.

If your check engine light comes on while driving, it may mean the U0002 Jeep issue. This is a CAN bus circuit communication issue. Common reasons are faulty wiring or connections in the can bus network. To fix it, first, use a scanner to find the cause. check and test the control modules for proper functioning.

If you see check engine light illuminated when starting your car, it could be U0002 Dodge. This code relates to a CAN bus circuit communication issue. Likely causes: faulty wiring: poor connections, damaged wires, or short circuits in the wiring harness can disrupt communication on the can bus. Do first, use a scanner to find the cause. check wiring and connectors: inspect the wiring harness for any damage, corrosion, or loose connections. repair or replace any faulty wiring or connectors.

To solve the U0002 Chrysler problem (which is a CAN bus circuit communication issue), you should first, use a scanner to find the cause. test and potentially replace any malfunctioning control modules or sensors. This issue causes check engine light is illuminated and often comes from faulty wiring or connections in the can bus system.

Usually, this happens because damaged wiring harnesses. The U0002 code means a problem with the vehicle's high-speed CAN bus (a network for module communication). You may notice check engine light illuminated. To resolve it, first, use a scanner to find the cause. inspect the wiring harnesses and connectors for any damage or corrosion, repairing or replacing as necessary.

When the vehicle's CAN bus has communication problems, U0001 RAM appears. You'll likely see check engine light illuminated on the dashboard. It usually happens because damaged wiring or connectors in the can bus circuit. Next, first, use a scanner to find the cause. check the electronic control units (ecus) for any faults and replace them if necessary.

If your check engine light comes on while driving, it may mean the U0001 issue. This is a problem with the vehicle's high-speed CAN bus (a network for module communication). Common reasons are bad can bus wiring: damaged or rusty wiring within the high speed can bus system can disrupt communication between modules. To fix it, first, use a scanner to find the cause. check the wiring harness, connectors, and terminals in the high speed can bus system for any signs of damage, corrosion, or loose connections.

If you see check engine light illuminated when starting your car, it could be U0001 Lincoln. This code relates to a problem with the vehicle's high-speed CAN bus (a network for module communication). Likely causes: faulty control module: a malfunctioning control module within the high speed can bus system can trigger the u0001 code. Do first, use a scanner to find the cause. check wiring and connectors: inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. repair or replace as necessary.

To solve the U0001 Jeep problem (which is a CAN bus circuit communication issue), you should first, use a scanner to find the cause. check for any loose connections or poor grounds within the network. This issue causes check engine light illuminated on the dashboard and often comes from faulty can bus wiring or connectors.

Usually, this happens because damaged wiring harnesses or connectors. The U0001 GMC code means a problem with the vehicle's high-speed CAN bus (a network for module communication). You may notice check engine light illuminated. To resolve it, first, use a scanner to find the cause. check and secure all connections related to the high-speed can communication bus.

When the vehicle's CAN bus has communication problems, U0001 Ford appears. You'll likely see check engine light illuminated. It usually happens because faulty high-speed can bus wiring. Next, first, use a scanner to find the cause. inspect the high-speed can bus wiring for any damage or corrosion, repairing or replacing as necessary.

If your check engine light comes on while driving, it may mean the U0001 Dodge issue. This is a CAN bus circuit communication issue. Common reasons are wiring issues, such as damaged or rusty wires affecting the can bus circuit. To fix it, first, use a scanner to find the cause. inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections.

If you see check engine light illuminated when starting your car, it could be U0001 Chrysler. This code relates to a CAN bus circuit communication issue. Likely causes: faulty can bus wiring or connectors. Do first, use a scanner to find the cause. test the continuity and resistance of the wiring to ensure proper connectivity.

To solve the U0001 Chevrolet problem (which is a problem with the vehicle's high-speed CAN bus (a network for module communication)), you should first, use a scanner to find the cause. use a multimeter to check the continuity and resistance of the wiring to identify any open circuits or short circuits. This issue causes check engine light, abs, or airbag light and often comes from damaged wiring harnesses.

Usually, this happens because corroded or damaged wiring harnesses. The U0001 Cadillac code means a problem with the vehicle's high-speed CAN bus (a network for module communication). You may notice check engine light illuminated. To resolve it, first, use a scanner to find the cause. check for any signs of corrosion, damage, or loose connections and repair or replace as needed.

If your check engine light turns on in your Lincoln, it might be due to the U0004 code, which points to a problem with the High-Speed CAN bus—this network lets vehicle modules talk fast. Common causes include damaged/corroded wires, loose connectors, a faulty module, water getting in, or electrical interference. You might notice erratic behavior like stalling, inoperative systems (ABS, airbags), or lower fuel efficiency. To fix it, use a scan tool to diagnose, repair/replace bad wires/connectors, test and replace faulty modules, clear the code, then test drive to confirm.

When the U0004 code appears in your Mercury, it means the High-Speed CAN bus (which connects control modules) has low voltage, disrupting communication. Your check engine light will likely come on, and you may face stalling, transmission issues, or ABS malfunctions. This usually happens from damaged wires, a bad control module, loose connectors, water damage, or electrical interference. First, use a diagnostic scanner to find the issue, check wires/connectors for damage (repair/replace as needed), test modules, clear the code, then road test to ensure it’s fixed.

Typically, the U0005 code happens because the High-Speed CAN bus—what lets your vehicle’s ECUs (like engine or ABS modules) communicate—has high voltage. Your check engine light will turn on, and you might see erratic behavior (stalling, rough idle), reduced performance, or lost communication between systems. Causes include faulty wires, short circuits, a bad control module, water damage, or electrical overload. To address it, use a scan tool to diagnose, repair/replace damaged wires, test and replace faulty modules, clear the code, then recheck with the scanner.

To solve the U0005 code in your Ford, start by knowing it stems from high voltage on the High-Speed CAN bus (which links control modules). Your check engine light will be on, and you may have erratic electronics, safety system malfunctions, or engine issues. Common causes are wiring shorts, a bad control module, power supply problems, corroded wires, or water in connectors. Inspect wires/connectors for damage, check the power supply, use a scan tool to find faulty modules, repair/replace parts, clear the code, then test drive.

If your Lincoln has erratic behavior like stalling or a lit check engine light, you might have the U0005 code—it means the High-Speed CAN bus has high voltage on its positive side, disrupting ECU communication. Causes include damaged wires, short circuits, a faulty ECU, water damage, or electrical overload. You may also lose instrument cluster function or enter limp mode. Diagnose with a scan tool, repair/replace bad wires/connectors, test and replace faulty ECUs, clear the code, then test drive to ensure restored communication.

When your Mercury’s check engine light is on and you notice stalling or lower fuel efficiency, the U0005 code could be the culprit—it signals high voltage on the High-Speed CAN bus’s positive side, hampering module communication. This is often from wiring shorts, corroded wires, a bad module, water damage, or aftermarket interference. First, inspect the CAN bus wires/connectors for damage, test the module, clear the code, then test drive. If the code returns, consult a pro for further diagnosis.

The U0006 code means your vehicle’s High-Speed CAN bus (for component communication) has an open circuit on its negative side—this is a break in wiring/connections stopping signal flow. Your check engine light will come on, and you may face inoperative systems (ABS, airbags), rough idling, or reduced performance. Causes include damaged/corroded wires, loose connections, a bad control module, water intrusion, or physical wire damage. Use a scan tool to diagnose, repair/replace bad wires/connectors/modules, clear the code, then verify communication with the scanner.

If your check engine light is on and your vehicle has rough idling or transmission shifts issues, the U0007 code could be to blame—it refers to low voltage on the High-Speed CAN bus’s negative side, disrupting ECU communication. Common causes are damaged wires, a faulty module, a short to ground, or water damage. You may also lose engine power. To fix it, use a scan tool to diagnose, repair/replace bad wires/connectors/modules, clear the code, then test drive to confirm the issue is resolved.

If your Ford’s airbag warning light is on and the airbag fails self-tests, the B0001 code could be the issue—it affects the driver frontal airbag’s stage 1 deployment control. This means the airbag might not deploy right in a crash. Causes include bad sensors/modules, wiring issues, corrosion, collision damage, or defects. Use a scanner to find the problem, inspect sensors/wires for damage, replace faulty parts, clear the code, then recalibrate the system if needed.

When the vehicle's CAN bus has communication problems, U0001 Buick appears. You'll likely see check engine light, abs light, or transmission light. It usually happens because damaged wiring or connectors in the high-speed can bus network. Next, first, use a scanner to find the cause. inspect wiring and connectors for damage, corrosion, or loose connections. repair or replace as needed.

Usually, the U0007 code in a Ford occurs because the High-Speed CAN bus (for module communication) has low voltage, causing communication issues. Your check engine light will illuminate, and you may see erratic system behavior (ABS, transmission) or even stalling. Causes include damaged wires, a bad control module, loose connections, or CAN bus malfunctions. Diagnose with a scan tool, inspect wires/connectors for damage (repair/replace), test modules, repair/replace faulty parts, clear the code, then test drive.

If your Dodge’s SRS warning light is on and there’s an airbag system message, the B0002 code is active—it’s about the driver frontal squib 2 control. This means the airbag may not deploy in a crash. Causes include a faulty squib module, loose/corroded wires, collision damage, wiring harness issues, or software glitches. Diagnose with a scanner, check the squib for damage, repair wires, replace the module if needed, clear the code, then reset the system.

Usually, the B0002 code in a Chrysler happens because the driver frontal squib 2 control (airbag part) is faulty. Your airbag warning light will be on, and the airbag may not deploy. Causes include a bad squib module, damaged wires, corrosion, collision damage, or network issues. First, diagnose to confirm the code, inspect squib-related wires/connectors, repair/replace parts, clear the code, then test to ensure the airbag works.

When your Acura’s airbag warning light won’t turn off, the B0002 code is likely—it signals low resistance in the driver’s airbag second inflator circuit. This could cause unexpected or no deployment. Causes include damaged wires, bad connectors, a faulty control module, corrosion, or collision damage. Diagnose with a scanner, inspect wires/connectors/module for damage, repair/replace parts, test the system, then clear the code to reset the light.

When your Mazda’s airbag warning light is on and there’s a communication loss with the airbag module, the B0001 code is active—it targets the driver’s airbag module. This risks no deployment in a crash. Causes include bad sensors, wiring issues, loose connections, corrosion, or collision damage. Diagnose with a scanner, inspect the sensor and wires, repair/replace damaged parts, reset the system, clear the code, then test the airbag.

If your Lincoln’s airbag warning light is on and it fails safety checks, the B0001 code is to blame—it affects the driver frontal airbag’s stage 1 deployment control. This means the airbag might not work in a crash. Causes include bad modules, wiring issues, faulty sensors, a broken clockspring, or front damage. Use a scanner to diagnose, inspect modules/wires/sensors, replace faulty parts (like the clockspring), clear the code, then reset the system.

The B0002 code means your vehicle’s driver frontal airbag stage 2 deployment control has a cross-coupled signal—this disrupts communication, so the airbag may not deploy right. Your airbag warning light will turn on, and you might see a system failure message. Causes include bad wires/modules, collision damage, corrosion, or software issues. Inspect the airbag system, repair/replace damaged wires/modules, clear the code, reset the system, then test deployment.

If your Nissan’s airbag warning light is on and the horn works intermittently, the B0001 code could be it—it’s an issue with the driver airbag module. This means the airbag may not deploy in a crash. Causes include a faulty module, wiring issues, bad sensors, or module damage. Use a scanner to find the problem, inspect wires for damage, test sensors, replace the module if needed, clear the code, then test the system.

To solve the B0001 code in your Mercury, start by disconnecting the battery (to avoid accidental airbag deployment)—this code relates to the driver frontal airbag’s stage 1 deployment control. Your airbag warning light will be on, and the airbag may not deploy. Causes include bad sensors, loose/corroded wires, a faulty module, or past collision damage. Inspect sensors/wires, test the module, replace faulty parts, clear the code, then test the system.

To address the B0001 code in your Jeep, know it’s about the driver frontal squib 1 control (airbag inflator’s control). Your airbag warning light will be on, and the airbag may not deploy. The main cause is often a faulty airbag control module. First, use a scan tool to diagnose, find the issue source, then repair/replace the module or fix related parts, clear the code, and test the system.

Typically, the B0001 code in an Infiniti occurs because the driver airbag module is faulty—this critical safety part may not deploy in a crash. Your airbag warning light will turn on, and you might see a system fault message. Causes include bad sensors, wiring issues, a faulty control module, or module damage. Diagnose with a scanner, inspect sensors/wires for damage, check the control module, replace faulty parts, clear the code, then test the module.

When your Honda’s SRS warning light is on and the driver’s airbag acts up, the B0001 code is likely—it signals low resistance in the airbag’s first inflator. This risks improper deployment in a crash. Causes include damaged wires, a bad inflator, collision damage, corrosion, or defects. Diagnose with a tool, test the inflator’s resistance, repair/replace wires or the inflator, clear the code, then test drive to confirm the system works.

To solve the B0001 code in your Dodge, start by knowing it’s an issue with the driver frontal squib 1 control (key for airbag deployment). Your airbag warning light will be on, and the airbag may not activate in tests. Common causes are a faulty squib unit, bad control module, blown fuse, or wiring issues. Diagnose with a scanner, check the squib for damage/loose connections, inspect the module and wires, replace faulty parts, clear the code, then test.

Usually, the B0001 code in a Chrysler happens because the driver frontal squib 1 control (part of the airbag system) is faulty. Your airbag warning light will illuminate, and the airbag may not deploy in a crash. Causes include a bad squib module, damaged wires, a faulty crash sensor, corrosion, or a past collision. Use a scan tool to read codes, inspect airbag wires/connectors, test and replace the squib or sensor if needed, clear the code, then verify the system works.

When the B0001 code appears in your Acura, it means the driver’s airbag first inflator has lower resistance than normal—this could stop the airbag from deploying right in a crash. Your airbag warning light will turn on, and the airbag might not work in tests. This usually happens from a bad inflator, damaged wires, corrosion, a faulty control module, or collision damage. Diagnose with a scanner, check the inflator/wires for damage, repair/replace parts, clear the code, then test the system.

If your airbag warning light stays on, it could be due to the B0001 code—this points to a problem with your vehicle’s driver frontal airbag deployment control system. Common causes include a faulty airbag module, damaged wires/connectors, corroded sensors, or a past collision. You might also notice a non-working horn. To fix it, use a professional scanner to diagnose, inspect wires for damage, replace the faulty module if needed, clear the code, then test the airbag system.

When your Mercury has a lit check engine light and transmission shifting issues, the U0007 code might be active—it means the High-Speed CAN bus has low voltage on its negative terminal, causing system communication errors. You may also have rough idling or lost traction control. Causes include damaged wires, a bad module, low voltage, power supply issues, or corrosion. Inspect CAN bus wires/connectors, check voltage, test the module, fix power supply issues, clear the code, then test drive to confirm resolution.

To address the U0007 code in your Lincoln, know it’s from low voltage on the High-Speed CAN bus’s negative side—disrupting module communication. Your check engine light will be on, and you may have power window issues, transmission problems, or trouble starting. Causes include damaged wires, a bad module, short circuits, power supply issues, or corrosion. Inspect CAN bus wires/connectors, check voltage with a multimeter, test modules, repair/replace parts, clear the code, then test drive.

To solve the B0002 code in your Ford, start by knowing it’s a cross-coupled signal issue in the driver frontal airbag stage 2 deployment control. Your airbag warning light will be on, and the airbag may not work in a crash. Causes include bad wires/modules, damaged sensors, corrosion, or software issues. Use a scanner to find the problem, inspect wires/sensors for damage, replace faulty parts, clear the code, then test the system.

When your Honda’s airbag warning light stays on even after resetting, the B0002 code is to blame—it means the driver’s airbag second inflator has low resistance. This risks faulty deployment. Causes include damaged wires, a bad inflator/control module, loose connections, or collision damage. Inspect the airbag system, test the inflator’s resistance, repair/replace wires or modules, clear the code, then test to ensure proper function.

Typically, the B0002 code in an Infiniti occurs because the driver airbag module is faulty—this makes the airbag warning light turn on, and the airbag may not deploy. Causes include a bad module, wiring issues, faulty sensors, control module problems, or past collision damage. Use a professional tool to diagnose, inspect the module/wires/sensors, repair/replace faulty parts, clear the code, test the system, then reset the warning light.

If your Jeep’s airbag warning light is on and the airbag has deployment issues, the B0002 code is likely—it’s about the driver frontal squib 2 control. This means the airbag may not work in a crash. Causes include a faulty squib module, wiring issues, collision damage, corrosion, or a bad inflator. Diagnose with a pro scanner, inspect wires/connectors, test the squib module, replace faulty parts, clear the code, then test the system.

To address the B0002 code in your Lincoln, know it’s a cross-coupled signal in the driver frontal airbag stage 2 deployment control. Your airbag warning light will be on, and the airbag may not deploy. Causes include damaged wires, faulty sensors/modules, corrosion, or collision damage. Use a scanner to find the issue, inspect wires/sensors, repair/replace parts, clear the code, reset the light, then test deployment in a controlled setting.

When your Mazda’s airbag warning light is on and it fails safety checks, the B0002 code is active—it affects the driver’s airbag module. This means the airbag may not deploy in a crash. Causes include bad modules/sensors, wiring issues, collision damage, corrosion, or software glitches. Diagnose with a scanner, inspect wires/connectors, replace the faulty module/sensor, clear the code, then test the airbag system to confirm it works.

If your Mercury’s airbag warning light is on and there’s a system failure message, the B0002 code is to blame—it’s a cross-coupled signal in the driver frontal airbag stage 2 deployment control. This risks no deployment. Causes include bad wires/modules, collision damage, corrosion, or short circuits. Do a diagnostic scan, inspect wires for damage, test the control module, replace faulty parts, clear the code, then test deployment.

To solve the B0002 code in your Nissan, start by using an OBD-II scanner—it targets the driver airbag module, so the airbag may not deploy. Your airbag warning light will be on, and there may be an audible chime. Causes include a faulty module, wiring issues, bad sensors, SRS electrical problems, or a bad inflator. Inspect the module/wires/sensors, repair/replace parts, clear the code, then test the system and reset the light.

The B0003 code indicates your vehicle’s driver frontal airbag stage 3 deployment control circuit is faulty—this means the airbag may not deploy in a crash. Your airbag warning light will turn on, and the system may fail self-tests. Causes include a bad control module, damaged wires, a faulty sensor, or an issue with the airbag itself. Use a scan tool to diagnose, repair/replace wires or the module, test the system, then clear the code to reset the light.

When your Mazda’s airbag warning light won’t reset and the airbag acts erratically, the B0003 code is likely—it’s about the driver frontal airbag stage 3 deployment control. This risks wrong or no deployment. Causes include a bad deployment module, wiring issues, collision damage, corrosion, or software glitches. Diagnose with a scanner, inspect wires for damage, test the module, replace faulty parts, clear the code, then test deployment to confirm.

Usually, the B0004 code happens because your vehicle’s driver knee bolster deployment control (protects knees in crashes) is faulty. Your airbag warning light will be on, and there may be an audible chime. Causes include bad collision sensors, damaged wires, a faulty control module, mechanical issues, or moisture corrosion. Use a pro tool to diagnose, inspect sensors/wires, test the module, repair/replace parts, then ensure the bolster deploys.

If your Ford’s airbag warning light is on and the knee bolster makes strange noises, the B0004 code is active—it affects the knee bolster deployment control. This means the bolster may not protect knees in a crash. Causes include a bad control module, wiring issues, faulty sensors, physical damage, or software glitches. Diagnose with a scanner, inspect wires for damage, test sensors, replace the module if needed, clear the code, then test deployment.

To address the B0004 code in your Lincoln, inspect the driver knee bolster airbag system—it’s a deployment control issue, so the bolster may not deploy. Your airbag warning light will be on, and other airbags may have issues. Causes include bad sensors, wiring shorts, a faulty module, physical damage, or software glitches. Use a scanner to get codes, test sensors/wires, update or replace the module, clear the code, then test deployment.

When your Mercury’s airbag warning light won’t turn off, the B0004 code is to blame—it’s the driver knee bolster deployment control system. This means the bolster may not deploy in a crash. Causes include a bad module, damaged wires, faulty sensors, collision damage, or software glitches. Diagnose with a scanner, inspect wires/connectors, test sensors, replace the module if needed, clear the code, then test deployment in a controlled setting.

To solve the B0005 code, start by using a diagnostic scanner—it’s your vehicle’s collapsible steering column deployment control (absorbs crash impact) that’s faulty. Your airbag warning light will be on, and the steering may feel loose. Causes include a bad control module, sensor issues, damaged wires, mechanical failure, or past collision damage. Inspect sensors/wires, test the module, repair/replace steering parts, clear the code, then test drive to confirm.

If your Ford’s airbag warning light is on and the steering column rattles, the B0005 code is likely—it’s the collapsible steering column deployment control. This means the column may not collapse in a crash. Causes include a bad control module, corroded wires, a faulty position sensor, collision damage, or a bad mechanism. Diagnose with a scanner, inspect wires/sensors, replace the module or sensor, test the column, then clear the code to reset.

To solve the C0002 code, start by checking the TCS Control Channel ‘A’ Valve 2—this valve controls hydraulic fluid for traction control, so a fault can reduce stability. Your TCS warning light will be on, and the system may not engage when needed. Common causes are damaged wiring, a stuck valve, debris, corrosion, or wear. Do a diagnostic scan, inspect the valve for damage, clean or replace it, fix any wiring issues, clear the code, then test the TCS system.

When your Mercury’s TCS warning light stays on and you have increased wheel slip, the C0004 code is likely—it’s an issue with the TCS Control Channel ‘B’ Valve 2. This valve helps maintain traction during acceleration. Causes include a bad TCS module, a faulty valve, damaged wires, or sensor failure. Diagnose with a scan tool, inspect the valve and wiring, replace faulty parts, clear the code, then test drive to ensure traction control works properly.

If your Mercury’s TCS warning light is on and you have trouble maintaining traction, the C0003 code is likely—it’s a problem with the TCS Control Channel ‘B’ Valve 1. This valve helps adjust brake pressure for stability. Causes include a faulty valve, damaged wires, a bad sensor, or a TCS module issue. Use a scan tool to pinpoint the issue, inspect the valve and wiring, replace faulty parts, clear the code, then test drive to confirm the fix.

To solve the C0003 code in your Mazda, start by checking the stability control solenoid valve system—this valve controls brake fluid to prevent skidding. Your stability control warning light will be on, and you may skid more during turns. Causes include a faulty solenoid, damaged wiring, corrosion, a bad module, or low brake fluid. Diagnose with a scanner, inspect the solenoid and wiring, clean or replace parts, clear the code, then test drive to ensure stability control works.

Usually, the C0003 code in a Lincoln occurs because the TCS Control Channel ‘B’ Valve 1 is malfunctioning—this valve regulates hydraulic fluid for traction control. Your TCS or ABS warning light will come on, and you may have less stability on wet roads. Causes include a faulty valve, wiring issues, a bad TCS module, or low fluid. Start with a diagnostic scan, inspect the valve and wiring, replace the valve if needed, top up fluid, clear the code, then test drive to verify.

When the C0003 code appears in your Ford, it means the TCS Control Channel ‘B’ Valve 1 is faulty—this valve helps traction control prevent wheel slip. Your TCS warning light will turn on, and you may notice more slip when accelerating. Causes include a bad valve, damaged wires, a faulty sensor, or a TCS module issue. Use a scan tool to diagnose, inspect the valve and wiring, replace faulty parts, clear the code, then test drive to make sure traction control works.

If your TCS or ABS warning light is on and you have trouble with traction during acceleration, the C0003 code could be the issue—it affects the TCS Control Channel ‘B’ Valve 1. This valve controls brake fluid for stability. Causes include a faulty TCS module, damaged wires, a bad valve, low brake fluid, or corrosion. Do a diagnostic scan, check the wiring and valve, repair or replace parts, clear the code, then test drive to confirm the fix.

To address the C0002 code in your Mercury, know it’s a problem with the TCS Control Channel ‘A’ Valve 2—this valve is crucial for preventing wheel slip. Your TCS warning light will be on, and you may have erratic braking. Causes include a bad TCS module, a faulty valve, wiring issues, or sensor failure. Use a scan tool to find the issue, inspect the valve and module, replace faulty parts, clear the code, then test drive to ensure traction control works.

When your Mazda’s TCS warning light stays on and you notice longer stopping distances, the C0002 code is likely—it’s an issue with the traction control solenoid valve system. This valve controls brake fluid flow for stability. Causes include a faulty solenoid, damaged wiring, a bad ABS module, or low brake fluid. Diagnose with a scanner, inspect the solenoid and wiring, replace faulty parts, bleed the brake system, clear the code, then test drive to confirm it works.

Usually, the C0002 code in a Lincoln happens because the TCS Control Channel ‘A’ Valve 2 is malfunctioning—this valve helps traction control by adjusting brake pressure. Your TCS warning light will come on, and you may have uneven braking or less traction. Causes include a faulty valve, damaged wiring, contaminated fluid, or a sensor glitch. Start with a scan, inspect the valve and wiring, replace the valve if needed, clear the code, then test drive to verify the fix.

If your Ford’s TCS warning light is on and you have trouble staying stable on slippery roads, the C0002 code is active—it’s a problem with the TCS Control Channel ‘A’ Valve 2. This valve regulates traction control hydraulic fluid. Causes include a faulty valve, damaged wires, corrosion, or an ABS module issue. Use a diagnostic tool to confirm, inspect the valve and wiring, replace faulty parts, clear the code, then test drive to make sure traction control functions properly.

If your check engine light turns on and you notice erratic shifting or ABS issues, it could be the C0000 code—this points to a problem with the vehicle’s speed information circuit. Common causes include a faulty speed sensor, damaged wiring, a glitchy onboard computer, or corroded connections. To fix it, use a diagnostic scanner to find the issue, check the wiring for damage, test and replace the speed sensor if needed, reset the computer, then take a test drive to confirm it works.

When the C0001 code appears in your Mercury, it means the TCS Control Channel ‘A’ Valve 1 is faulty—this valve helps maintain traction in slippery conditions. Your TCS warning light will turn on, and you may notice more wheel slip when accelerating. Causes include a bad TCS module, a faulty valve, wiring issues, or low brake fluid. Use a scan tool to pinpoint the issue, inspect the valve and wiring, replace faulty parts, clear the code, then test drive to ensure traction control works.

If your Mazda’s TCS warning light is on and you struggle with stability during cornering, the C0001 code is likely—it’s a problem with the traction control solenoid valve system. This valve modulates brake pressure to prevent wheel slip. Causes include a faulty solenoid, damaged wiring, corrosion, or a bad ABS module. Diagnose with a scanner, inspect the solenoid and wiring, clean or replace the solenoid, test the traction control, then clear the code to reset the light.

To address the C0001 code in your Lincoln, know it’s an issue with the TCS Control Channel ‘A’ Valve 1—this valve is key for traction control and ABS stability. Your ABS or TCS warning light will be on, and you may have less traction on wet roads. Causes include a faulty valve, wiring issues, a bad ABS module, or a sensor glitch. Use a professional scan tool to diagnose, inspect the valve and wiring, replace faulty parts, clear the code, then test drive to confirm the fix.

Usually, the C0001 code in a Ford occurs because the TCS Control Channel ‘A’ Valve 1 is malfunctioning—this valve helps regulate brake pressure for traction control. Your TCS warning light will come on, and you may notice more wheel slip when accelerating. Causes include a bad TCS module, damaged wires, a faulty sensor, or hydraulic issues. Start with a diagnostic scan, inspect the module, wiring, and sensors, repair or replace faulty parts, clear the code, then test drive to make sure traction control works.

When the C0001 code triggers, it means there’s a problem with the TCS Control Channel ‘A’ Valve 1—this valve helps your traction control system prevent wheel slip. You’ll see the TCS or ABS warning light, and may have less traction on slippery roads. Common causes are a faulty valve, damaged wiring, corrosion, bad wheel speed sensors, or an ABS module issue. Use a diagnostic scanner to find the issue, inspect the valve and wiring, clean or replace the valve, test the TCS system, then clear the code.

If your GMC’s check engine light is on and the speedometer is inaccurate, you may have the C0000 code—it’s an issue with the speed information circuit. This circuit sends speed data to control the speedometer, cruise control, and transmission. Causes include a faulty wheel or transmission speed sensor, wiring issues, or a bad computer. First, use a scanner to read codes, test the sensors, check the wiring for damage, replace faulty parts, clear the code, then test drive to confirm the fix.

To solve the C0000 code in your Chevrolet, start by knowing it’s a problem with the speed information circuit—this circuit gives real-time speed data to your car’s computer for transmission and ABS. Your check engine light will be on, and you might notice erratic shifting or a non-working cruise control. Common causes are a bad speed sensor, damaged wires, corrosion, or a faulty ABS module. Diagnose with a scanner, inspect the sensor and wiring, replace faulty parts, clear the code, then test drive to ensure it works.

Usually, the C0000 code in a Cadillac happens because the speed information circuit is malfunctioning—this circuit feeds speed data to systems like transmission and ABS. Your check engine light will come on, and you may have a broken speedometer or ABS issues. Causes include a faulty speed sensor, damaged wires, a bad control module, or corrosion. Use a scan tool to confirm the code, check the sensor and wiring for damage, test the control module, replace faulty parts, clear the code, then test drive to verify.

When the C0000 code appears in your Buick, it means there’s an issue with the speed information circuit—this circuit sends accurate speed data to your car’s computer, which is key for transmission, ABS, and cruise control. You might see the check engine light, get wrong speedometer readings, or lose cruise control. Usually, it’s from a bad speed sensor, damaged wires, a faulty ECM, or corrosion. Start with a diagnostic scan, inspect the sensor and wiring, replace faulty parts, clear the code, then test drive to make sure it’s fixed.

When the C0004 code triggers, it means the TCS Control Channel ‘B’ Valve 2 is faulty—this valve helps traction control prevent wheel slip. Your TCS warning light will be on, and you may have less stability during cornering. Causes include a blocked valve, damaged wiring, a stuck component, corrosion, or wear. Do a visual check of the TCS system, use a scanner to diagnose, inspect and clean or replace the valve, clear the code, then test drive to make sure it works.

If your Ford’s TCS warning light is on and you lose traction control in slippery conditions, the C0004 code is active—it’s an issue with the TCS Control Channel ‘B’ Valve 2. This valve regulates traction control hydraulic fluid. Causes include a faulty valve, damaged wires, a bad sensor, or corrosion. Use a diagnostic tool to confirm, inspect the valve and wiring, replace faulty parts, clear the code, then test drive to ensure traction control functions properly.

Usually, the C0004 code in a Lincoln happens because the TCS Control Channel ‘B’ Valve 2 is malfunctioning—this valve is key for traction control and braking stability. Your TCS warning light will come on, and you may have uneven braking. Causes include electrical faults, a bad sensor, a faulty valve, or corrosion. Start with a scan, inspect the valve and wiring, replace the valve if needed, fix any electrical issues, clear the code, then test drive to verify the fix.

To address the C0004 code in your Mazda, know it’s a problem with the stability control solenoid valve system—this valve controls brake fluid to keep the car stable. Your stability control warning light will be on, and you may struggle to steer in sudden maneuvers. Causes include electrical faults, damaged wiring, a faulty solenoid, or a bad module. Use a scanner to diagnose, inspect the solenoid and wiring, replace faulty parts, clear the code, then test drive to confirm it works.

To solve the C0010 code, start by checking the left front inlet control—this component manages air or fluid flow to the left front, affecting systems like braking or suspension. Your dashboard warning light will be on, and you may notice poor engine performance or weird noises. Causes include a faulty sensor/module, damaged wiring, software glitches, or debris. Do a diagnostic scan, inspect the sensor and wiring, replace faulty parts, clear the code, then test drive to confirm the fix.

If your Acura’s ABS warning light is on and you feel uneven braking, the C0010 code is likely—it’s a left front inlet solenoid circuit failure. This solenoid controls fluid flow for braking/suspension. Causes include damaged wires, a faulty solenoid, a bad module, or corrosion. Use a multimeter to test the circuit, inspect the solenoid and wiring, replace faulty parts, clear the code, then test drive to make sure braking is smooth.

When the C0010 code appears in your Ford, it means the left front inlet control system is faulty—this system controls airflow to the left front wheel for braking. Your ABS warning light will turn on, and you may have longer stopping distances or squealing brakes. Causes include a bad control valve, damaged wires, blockages, or a sensor glitch. Use a scan tool to diagnose, inspect the valve and wiring, clear blockages, replace parts, clear the code, then test drive to verify.

Usually, the C0010 code in a Honda occurs because the left front inlet solenoid circuit is failing—this solenoid regulates ABS brake pressure. Your ABS warning light will come on, and you may have longer stopping distances or grinding brakes. Causes include damaged wires, a faulty solenoid, a bad ABS module, or debris. Start with a visual ABS inspection, test the circuit with a multimeter, replace faulty parts, clear the code, then test drive to ensure ABS works.

If your Lincoln’s ABS warning light is on and you pull to one side when braking, the C0010 code is active—it’s a problem with the left front inlet control. This control regulates brake fluid flow to the left front wheel. Causes include a faulty valve, damaged wires, corrosion, a bad ABS module, or a sensor issue. Use a scan tool to find the issue, inspect the valve and wiring, replace parts, clear the code, then test drive to confirm braking is even.

FAQs About Diagnostic Trouble Codes

The check engine light comes on when the OBD-II system detects a problem.

You can use our diagnostic code lookup tool by entering the trouble code (e.g., P1401) in the search box. You'll immediately get an explanation of the problem, common causes, and possible solutions.

Yes and no. Universal trouble codes (0) apply to all vehicles, while manufacturer-specific trouble codes (1) may vary by brand. Be sure to check whether your trouble code is universal or brand-specific.

If the check engine light is on permanently, it's probably a minor problem. If it's flashing, stop driving immediately; this usually indicates a serious problem, such as an engine misfire.

Yes. Most OBD-II scanners allow you to clear the DTC, but if the problem isn't resolved, the check engine light may come back on.

The OBD-II diagnostic port is typically located under the driver's side dashboard, near the steering column.
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