Hybrid/EV Electronics Coolant Temperature Sensor A Circuit Intermittent/Erratic

Where it lives

For P0CF2, the sensor sits on the circuit this code reports. The description of P0CF2 reports a fault at the sensor.

Check these first

• A loose electronics coolant temperature sensor A connector
• Chafed wiring to sensor A
• A sensor A element breaking down when hot
• Deposits on sensor A
• Electrical interference on the sensor A line

What to do next

1. Road test and watch hybrid electronics coolant temperature sensor A
2. Wiggle test the sensor A connector and harness
3. Heat the sensor A area and watch for a dropout
4. Inspect the sensor A wiring for chafing
5. Replace sensor A if the signal cuts out
6. Clear the code and retest

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