Auxiliary Cooling System Coolant Temperature Sensor A Circuit High

Where it lives

For P0E84, the sensor sits on the circuit this code reports. The description of P0E84 reports a fault at the sensor.

Check these first

• A short to voltage on the sensor A signal
• An open sensor A ground lifting the signal
• A failed sensor A reading high
• Water in the sensor A connector

What to do next

1. Read the auxiliary coolant temperature sensor A on a scan tool
2. Check the sensor A signal for a short to voltage
3. Verify the sensor A ground
4. Inspect the connector for water and corrosion
5. Replace the sensor if the reading stays high
6. Clear the code and retest

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