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OBD II Fault Code

  • OBD II P2640

    OBD-II Code Transmission may not shift properly is defined as a Torque Management Feedback Signal "A" High

    The Transmission Control Module and the engine computer (PCM) constantly talk to each other to ensure that they are working together to produce the desired power output. If the two modules fail to communicate with each other, code P2640 is set.

    Transmission may not shift properly Symptoms

    • Transmission may not shift properly

    Common Problems That Trigger the P2640 Code

    • Powertrain Control Module (PCM) failure
    • Transmission Control Module (TCM) failure
    • Wiring issue

    Common Repairs Needed for the P2640 Code

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