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Our automotive experts have put together the following information about the P0AA0 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 P0AA0 code.

OBD II Fault Code

  • OBD II P0AA0

    OBD-II Code High voltage system may not operate is defined as a Hybrid Battery Positive Contactor Circuit

    The High Voltage System is engaged and disengaged through the Hybrid Control Module. If the Hybrid Control Module cannot control the circuit to the high voltage battery, code P0AA0 will set.The Hybrid Control Module may disable the high voltage system.

    High voltage system may not operate Symptoms

    • High voltage system may not operate
    • Vehicle will not charge

    Common Problems That Trigger the P0AA0 Code

    • High voltage control module failure
    • Wiring issue
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