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OBD II Fault Code

  • OBD II P0AAF

OBD-II Code High voltage control module failure is defined as a Hybrid Battery Pack Air Temperature Sensor "A" 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 P0AAF. This temperature sensor is part of the battery pack assembly on most high voltage vehicles.

Common Problems That Trigger the P0AAF Code

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