Generator Temperature Sensor Circuit Low

Where it lives

For P0A38, the circuit described runs through the sensor. The description of P0A38 reports a fault at the sensor.

Check these first

• A short to ground in the generator temperature sensor circuit
• A generator temperature sensor that reads low
• Water or corrosion at the sensor
• A control module fault

What to do next

1. Read generator temperature sensor voltage on a scan tool
2. Check the circuit for a short to ground
3. Inspect the sensor for water or corrosion
4. Check the sensor connections
5. Replace the sensor if the low reading persists
6. Clear the code and retest

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