Motor Electronics Coolant Temperature Sensor C Circuit High

Where it lives

For P2BDF, the circuit described runs through the sensor. The description of P2BDF reports a fault at the sensor.

Check these first

• An open in the coolant temperature sensor C signal circuit
• A failed sensor C left with a fixed high resistance
• A disconnected or backed out sensor C connector
• Corrosion raising resistance in the sensor C terminals

What to do next

1. Read coolant temperature sensor C voltage on a scan tool
2. Check the sensor C connector for a full seat
3. Test the sensor C circuit for an open
4. Measure sensor C resistance across a temperature sweep
5. Replace coolant temperature sensor C if the circuit tests good
6. Clear the code and retest

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