OBD-II code · Powertrain (generic)
P04DC Fuel Fill Door Position Sensor Circuit Range or Performance
Same as P04B8 with the signal in plausible range yet not matching the actuator command - door reports closed when motor commanded open, or vice versa.
Is it safe to drive with P04DC?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor signal offset against actual position
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.2 h
- Emissions test
- Usually unaffected
- Parts involved
- Fuel Fill Door Position Sensor
Related codes
- P04D9Closed Loop EGR Control At Limit Flow Too Low
- P04DAClosed Loop EGR Control At Limit Flow Too High
- P04DBCrankcase Ventilation System Disconnected
- P04DDCold Start EGR A Flow Insufficient Detected
- P04DECold Start EGR A Flow Excessive Detected
- P04DFEVAP System Purge Control Valve A Performance Stuck Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.