Alternative Fuel Temperature Sensor Circuit Low

Where it lives

For P2A4D, the sensor sits on the circuit this code reports. The description of P2A4D reports a fault at the sensor.

Check these first

• A short to ground on the alternative fuel temperature sensor signal
• A failed alternative fuel temperature sensor reading low
• Low reference voltage at the fuel temperature sensor
• Corrosion in the alternative fuel temperature sensor connector
• A control module misreading the fuel temperature sensor low

What to do next

1. Read alternative fuel temperature on a scan tool
2. Test the fuel temperature sensor signal for a short to ground
3. Check the fuel temperature sensor reference voltage
4. Inspect the fuel temperature sensor connector
5. Replace the alternative fuel temperature sensor if the circuit tests good
6. Clear the code and retest

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