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Our automotive experts have put together the following information about the P063A 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 P063A code.

OBD II Fault Code

  • OBD II P063A

    OBD-II Code Engine may not start is defined as a Generator Voltage Sense Circuit

    The Alternator recharges the Battery when the engine is running. The Alternator is controlled by the engine control module (PCM). If the PCM detects an incorrect signal from the Alternator, the PCM will set code P063A.

    Engine may not start Symptoms

    • Engine may not start
    • Engine may stall

    Common Problems That Trigger the P063A Code

    • Alternator failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P063A Code

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