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Our automotive experts have put together the following information about the P2779 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P2779 code.

OBD II Fault Code

  • OBD II P2779

    OBD-II Code Tap shifting will be disabled is defined as a Downshift Switch Circuit Range/Performance

    Some vehicles equipped with automatic transmission will give the driver the option of selecting the desired gear while driving, known as TAP Shifting. The shifter will usually either have a + and - button on it, or shift side to side when in Drive. If the downshift switch does not function correctly, code P2779 will set and the TAP Shift function will be disabled.

    Tap shifting will be disabled Symptoms

    • Tap shifting will be disabled

    Common Problems That Trigger the P2779 Code

    • Body Control Module (BCM) failure
    • Shift lever assembly failure
    • Wiring issue
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