P04C6
Fuel Fill Door Lock Position Sensor/Switch Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring and connections of the fuel fill door lock position sensor/switch
- Test the fuel fill door lock position sensor/switch for proper functionality
- Replace the faulty fuel fill door lock position sensor/switch
- Inspect and repair any issues with the fuel fill door lock mechanism
Common causes
Most likely first
- Faulty fuel fill door lock position sensor/switch
- Wiring or connector issue in the fuel fill door lock position sensor/switch circuit
- Electrical short or open in the fuel fill door lock position sensor/switch circuit
- Malfunctioning fuel fill door lock actuator
- Control module problem related to the fuel fill door lock position sensor/switch circuit
How to diagnose & fix
Work through it in order
- Fuel cap not sealing properly
- Check engine light illuminated
- Difficulty starting the vehicle
- Decreased fuel efficiency
- Vehicle stalling or experiencing power loss
Read & clear P04C6 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.