What Does P0864 Code Mean?

    OBD-II Code P0864 is defined as a TCM Communication Circuit Range/Performance

    If the Transmission Control Module (TCM) cannot communicate with other modules or the engine control module (PCM) can not communicate with the PCM, code P0864 will be set.

    P0864 Symptoms

    • Increased fuel consumption
    • Transmission may not shift properly

    Common Problems That Trigger the P0864 Code

    • Transmission Control Module (TCM) failure
    • Wiring issue
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