P0864 OBD Error Code: Problem & Solutions

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When does the P0864 error code gets stored in your vehicle? If the traction control module sends a wrong or improper signal to the TCM, then the P0864 error code will be stored. The P0864 error code is valid only to vehicles which have a traction control system.

Vehicles with a CAN will use a communication bus as huge modules are used, so it can help ECM to share various modules input and output information. A P0864 error code will be stored if either the TCM or ECM cannot converse with other modules or PCM. The ECM receives information from the traction control module so it can help with the engine’s RPM, fuel delivery and more.

What causes this problem with the TCM Communication Circuit Range/Performance?

• The traction control on/off switch is faulty.
• The traction control module is broken.

1. Powertrain Control Module - Replacing the faulty PCM is highly essential to avoid P0864 error code.
2. Engine Control Module - Changing the defective ECM can help your vehicle run smoothly without a problem.
3. Transmission Control Module - Is there any fault in your traction control module? Get the replacement part from Parts Avatar at the best prices.
4. Traction Control Switch Connector - Is the component broken? Find the replacement for traction control switch connector from Parts Avatar to avoid P0864 error code.
5. Controller Area Network - Communication issue can arise mainly because of a faulty CAN. Replace them immediately.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0864 here:

Common Symptoms

• Illumination of the check engine light/ warning light.
• Blinking of the traction control light.
• Low fuel economy.
• Transmission reaches limp mode.
• Lack of traction due to slippery road conditions.
• Failure of the traction control system.

Want to correct the Trouble Code P0864? Read these points mentioned below:

• Replacing the damaged wires/ connectors.
• Traction control switch needs replacement.
• Traction control module must be fixed.
• Test drive, once the codes are cleared to see if the codes reappear.

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0864 code to be stored:

• Start your diagnosis with the help of a scanner where you check every wires and connector.
• This can help you to know if there is any erratic signal stored in the vehicle.
• Clear the error codes and check again if they appear so it can help to know if any malfunction occurred.
• Test drive the vehicle by clearing the codes. If the code does not instantly return, it is because of an irregular condition.
• Try to worsen this situation before proceeding with further diagnosis as it is a risky task.
• The best suggestion is to give it to the professionals as they know to handle them wisely.
• They will use a specialized scanner called Auto hex which identifies the error in the system quicker than other scan tools.
• If you remove and test every pin of CAN bus it will consume more time and money.
• The best idea is to install a memory saving device, in case you have to reprogram and the PCM and its controllers lose their memory.
• Every operation of the control module and pin values is clearly shown in the scanner. Also, while the engine is operating, it can clearly monitor the circuit problems without involving any risk.
• You have to fix the shorted or open circuits, damaged wires/ connectors.
• Every time you repair, re-check if the process is successful. Once every component proves to be successful, connect a scanner and recover all codes that are stored and freeze frame data.
• If you proceed with the process with a DVOM, you have to inspect thousands of individual circuits.
• You may end up reprogramming the system or destroying every expensive module, even if you misplace one probe. This can be avoided by doing a continuity test, which requires about 40 hours based on your vehicle where you have to separate all control modules.
• Start your diagnosis as few applications will use 18 different control modules and check every wire, circuits, and connector.
• If there is any defective or broken system ground, you will find this error code most often.
• Using an auxiliary cable can be highly helpful as you can check the discrepancies of the ground system.
• Once the repair is done you will find the hanging ground straps, cables, and wires which needs fixation.
• If there are defective electrical connectors it can give chance for this error to be stored and increases resistance. Perform a continuity test between the individual controller and connector after you find the necessary wire diagram and pinout charts.
• Compare your values with the ones specified by the manufacturer and fix the error.
• Removing the complicated wire circuits is a tedious process. So, it’s best to fix the defective wires.

Common Mistakes When Diagnosing the P0864 Code

The main problem may arise due to a broken switch or bad electrical connection whereas you will misplace the traction control module. So before proceeding with diagnosis, visually inspect all components for a P0864 error code.