Hybrid/EV Battery Temperature Sensor M Circuit High

Where it lives

For P0CAB, the circuit described runs through the sensor. The description of P0CAB reports a fault at the sensor.

Check these first

• An open in the sensor M signal or return
• A short to voltage on the sensor M wire
• A disconnected sensor M connector
• High resistance at the sensor M ground
• Water or corrosion at the sensor M connector

What to do next

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

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