P04C3
Fuel Fill Door Lock Position Sensor/Switch Circuit
Generic OBD-II
Common symptoms
What you'll notice
- Check and fix any loose or damaged wiring connections related to the fuel fill door lock position sensor/switch circuit.
- Inspect and replace the faulty fuel fill door lock position sensor/switch if necessary.
- Ensure that there is no debris or obstructions blocking the fuel fill door from closing properly.
- Reset the vehicle's computer system to see if it resolves the issue.
Common causes
Most likely first
- Faulty fuel fill door lock position sensor/switch
- Loose or damaged wiring/connectors in the fuel fill door lock position sensor/switch circuit
- Malfunctioning fuel fill door lock actuator
- Corroded or damaged fuel fill door lock position sensor/switch circuitry
How to diagnose & fix
Work through it in order
- Fuel fill door does not lock properly or remains unlocked
- Fuel fill door lock indicator on the dashboard is illuminated
- Difficulty in opening or closing the fuel fill door
- Fuel fill door lock mechanism is noisy or makes unusual sounds when operating
- Malfunctioning fuel fill door lock may result in fuel theft or tampering
Read & clear P04C3 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.