Generator Temperature Sensor Circuit Range/Performance

Where it lives

For P0A37, the description names the sensor as the part involved.

Check these first

• A generator temperature sensor that reads out of range
• A short or open in the sensor circuit
• An alternator that is overheating
• A sensor connector fault
• A control module fault

What to do next

1. Read generator temperature sensor data on a scan tool
2. Check the sensor circuit for short or open
3. Check the alternator and cooling
4. Inspect the sensor connector
5. Replace the sensor if the reading drifts
6. Clear the code and retest

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