Alternative Fuel Temperature Sensor Circuit

Where it lives

For P2A4B, the sensor sits on the circuit this code reports. The description of P2A4B reports a fault at the sensor.

Check these first

• An alternative fuel temperature sensor fault
• An open or short in the alternative fuel temperature sensor wiring
• A corroded alternative fuel temperature sensor connector
• A control module that cannot read the fuel temperature sensor
• A failed alternative fuel temperature sensor

What to do next

1. Read alternative fuel temperature on a scan tool
2. Compare fuel temperature to ambient after a cold soak
3. Test the alternative fuel temperature sensor circuit for open and short faults
4. Check the fuel temperature sensor connector pins
5. Replace the alternative fuel temperature sensor if the circuit tests good
6. Clear the code and retest

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