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Our automotive experts have put together the following information about the P0AB4 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 P0AB4 code.

OBD II Fault Code

  • OBD II P0AB4

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

    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 P0AB4. This temperature sensor is part of the battery pack assembly on most high voltage vehicles.

    Common Problems That Trigger the P0AB4 Code

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