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OBD II Fault Code

  • OBD II P081B

    OBD-II Code Engine may not start is defined as a Starter Disable Circuit High

    The engine computer (PCM) verifies that the transmission is in Park/Neutral before allowing the vehicle to crank. If the Transmission Control Module does not tell the PCM it is okay to crank the vehicle, code P081B will be set.

    Engine may not start Symptoms

    • Engine may not start

    Common Problems That Trigger the P081B Code

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