P0864

2017-10-10

Description:

  • The fault code P0864 pertains to a range or performance issue in the communication circuit between the transmission control module (TCM) and the vehicle's control system. This code typically indicates a problem with the transmission control module's ability to communicate effectively with the control system.

Possible Symptoms:

  • Malfunction Indicator Lamp (MIL) or Check Engine Light illuminated

  • Issues with transmission shifting, such as delayed or erratic shifting

  • Inability to shift gears

  • Transmission stuck in a particular gear

  • Limited drivability due to the range or performance problem in the TCM communication circuit

Possible Causes:

  • Faulty transmission control module (TCM)

  • Wiring or connection issues in the TCM communication circuit

  • Loose or corroded connectors in the TCM system

  • Faulty engine control module (ECM) or other control modules

  • Interference or signal disruption in the communication circuit

  • Incorrect programming or configuration of the TCM

Related Parts:

  • Traction Control Module (TCM): Most modern vehicles are equipped with anti-lock brakes and traction control. Traction Control Module (TCM) is the part of the car computer that controls the electronic stability system (ESC) of the car. Problem leads to inefficient braking, ABS not working

Possible Solutions:

  • Test and replace the faulty transmission control module (TCM), if necessary

  • Inspect and repair the TCM communication circuit for any wiring or connection problems

  • Ensure the connectors in the TCM system are securely connected and free from corrosion

  • Test and replace the faulty engine control module (ECM) or other control modules, if necessary

  • Address any interference or signal disruption issues in the communication circuit

  • Ensure the TCM is correctly programmed and configured

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