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OBD II Fault Code

  • OBD II P0804

    OBD-II Code The shift lamp will not illuminated is defined as a Upshift/Skip Shift Lamp Control Circuit

    The Shift Lamp is designed to alert the driver that the transmission needs to be put in a higher gear. If the lamp fails to operate as requested by the engine computer (PCM), code P0804 will be stored.

    The shift lamp will not illuminated Symptoms

    • The shift lamp will not illuminated

    Common Problems That Trigger the P0804 Code

    • Instrument cluster failure
    • Shift lamp bulb failure
    • Wiring issue
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