OBD-II code · Powertrain (generic)
P04C1 Fuel Fill Door Unlock Control Circuit Low
Same as P04BD on the unlock side. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P04C1?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl line shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–1.4 h
- Emissions test
- Usually unaffected
- Parts involved
- Fuel Fill Door Unlock Actuator
Related codes
- P04BEFuel Fill Door Lock Control Circuit High
- P04BFFuel Fill Door Unlock Control Circuit Open
- P04C0Fuel Fill Door Unlock Control Range or Performance
- P04C2Fuel Fill Door Unlock Control Circuit High
- P04C3Fuel Fill Door Lock Position Sensor Circuit
- P04C4Fuel Fill Door Lock Position Sensor Circuit Range or Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.