Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit

Where it lives

For P0C42, the sensor sits on the circuit this code reports. The description of P0C42 reports a fault at the sensor.

Check these first

• A failed hybrid battery pack coolant temperature sensor A
• An open or short in the sensor A wiring
• Low coolant in the battery pack loop
• A blockage in the battery pack coolant path

What to do next

1. Read battery pack coolant temperature sensor A on a scan tool
2. Check the battery pack coolant level
3. Check the coolant path for a blockage
4. Test the sensor A circuit for an open or short
5. Replace sensor A if the circuit tests good
6. Clear the code and retest

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