Hybrid/EV Battery Temperature Sensor J Circuit High

Where it lives

For P0C90, the circuit described runs through the sensor. The description of P0C90 reports a fault at the sensor.

Check these first

• An open in the sensor J signal or return
• A short to voltage on the sensor J wire
• A disconnected sensor J connector
• High resistance at the sensor J ground
• Excessive pack temperature near sensor J

What to do next

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

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