OBD-II code · Powertrain (generic)
P04BB Fuel Fill Door Lock Control Circuit Open
Fuel Fill Door Lock Control Circuit Open: the control circuit is open. Likely a broken wire, disconnected connector, or failed actuator.
Is it safe to drive with P04BB?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in harness or actuator winding
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
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 Lock Actuator
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.