Hybrid/EV Battery Pack Air Temperature Sensor A Circuit Intermittent/Erratic

Where it lives

For P0AB0, the sensor sits on the circuit this code reports. The description of P0AB0 reports a fault at the sensor.

Check these first

• A faulty intake air temperature sensor in the HV battery assembly
• An open or short in the HV battery assembly harness
• A poor electrical connection at the battery temperature sensor connector
• A faulty battery ECU

What to do next

1. Read the HV battery intake air temperature sensor on a scan tool
2. Compare the intake air temperature reading with the other battery sensors
3. Inspect the sensor connector and harness
4. Test the intake air temperature sensor circuit for open and short faults
5. Replace the battery ECU if the reading stays erratic
6. Clear the code and retest

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