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Our automotive experts have put together the following information about the P0A4A 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 P0A4A code.

OBD II Fault Code

  • OBD II P0A4A

    OBD-II Code High voltage system may not operate is defined as a Drive Motor "B" Position Sensor Circuit Overspeed

    The hybrid control module uses sensors to determine the position of the hybrid motor's internal components. If the hybrid control module determines there is a fault in the position sensor, the engine control module will set code P0A4A.

    High voltage system may not operate Symptoms

    • High voltage system may not operate

    Common Problems That Trigger the P0A4A Code

    • High voltage control module failure
    • High voltage motor failure
    • Wiring issue
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