Hybrid/EV Battery Temperature Sensor O Circuit High

Where it lives

For P0CB5, the circuit described runs through the sensor. The description of P0CB5 reports a fault at the sensor.

Check these first

• An open in the sensor O signal or return
• A short to voltage on the sensor O wire
• A disconnected sensor O connector
• High resistance at the sensor O ground
• A battery management system fault raising the reading

What to do next

1. Read hybrid battery temperature sensor O on a scan tool
2. Inspect the sensor O connector and wiring
3. Test the sensor O circuit for an open and a short to voltage
4. Measure the sensor O ground resistance
5. Replace sensor O if the reading stays high
6. Clear the code and retest

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