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Our automotive experts have put together the following information about the P0AAC 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 P0AAC code.

OBD II Fault Code

  • OBD II P0AAC

    OBD-II Code High voltage control module failure is defined as a Hybrid Battery Pack Air Temperature Sensor "A" Circuit

    The Battery Pack Air Temperature Sensor tells the High Voltage control module the temperature of the ambient air in and around the hybrid battery pack. If the High Voltage Control Module detects an incorrect signal from the Hybrid Battery Pack Air Temperature Sensor, it will set code P0AAC. This temperature sensor is part of the battery pack assembly on most high voltage vehicles.

    Common Problems That Trigger the P0AAC Code

    • High voltage battery assembly failure
    • High voltage control module failure
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