Hybrid/EV Battery Pack Air Temperature Sensor A Circuit High

Where it lives

For P0AAF, the circuit described runs through the sensor. The description of P0AAF reports a fault at the sensor.

Check these first

• A battery pack running hot from over or undercharge
• A battery pack air temperature sensor A reading high
• A short or wiring fault in the sensor circuit
• A cooling system blockage that traps heat

What to do next

1. Read battery pack air temperature sensor A data on a scan tool
2. Check the battery pack temperature
3. Test the sensor circuit for a short
4. Inspect the cooling system for blockage
5. Replace the sensor if the signal stays high
6. Clear the code and retest

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