Engine Oil Temperature Sensor B Circuit High

Where it lives

For P01BC, the circuit described runs through the sensor. The description of P01BC reports a fault at the sensor.

Check these first

• An open in the engine oil temperature sensor B signal wire
• High resistance at the sensor B connector
• A failed engine oil temperature sensor B
• A poor sensor B ground
• A faulty ECM input for sensor B

What to do next

1. Check the voltage at the sensor B signal wire
2. Test the sensor B circuit for an open
3. Inspect the sensor B connector for a loose fit
4. Measure the sensor B resistance against spec
5. Replace engine oil temperature sensor B if it reads high
6. Clear the code and retest

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