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P0864 is a diagnostic trouble code (DTC) for "Traction Control Module (TCM) Communication Circuit Range/Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0864 code is a generic powertrain code related to transmission problems, including sensor failures and pressure faults. In this case, the engine control module (ECM) has detected a fault with the traction control module, specifically related to the communication circuit.
Codes related to the P0864 include:
The P0864 code only applies to vehicles with an electronic traction control system.
Due to the large number of modules utilized, current vehicle’s with a communication area network (CAN) utilize a communication bus to help the ECM share input and output information with the various modules.
When the vehicle’s ECM has failed to receive input or the correct signals from the traction control module, a P0864 code may be stored. The traction control module communication circuit sends information to the ECM, as well as other related controllers, to help determine proper engine RPM and timing, fuel delivery, and more.
Several problems may cause a P0864 code including:
Symptoms of a P0864 code may include:
A mechanic may use several methods to diagnose a P0864 trouble code, including:
The traction control module may be incorrectly replaced when the root of the problem is a damaged or defective switch or poor electrical connection. It is recommended to visually inspect and fully diagnose all possible causes for a P0864 code prior to replacing the traction control module.
Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P0864 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.
Several repairs can fix a P0864 trouble code and include:
Due to the amount of electrical componentry and circuitry related to the transmission control module communication circuit, it is recommended to seek the assistance from a professional. Use of a specialized scanner can help pinpoint the location more easily.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.