OBD-II code · Powertrain (generic)
P04B7 Fuel Fill Door Position Sensor Circuit Intermittent or Erratic
The position sensor or switch on the fuel fill door reports an intermittent signal - opens and closes randomly without matching the actual door position. Typically a connector or chafed harness fault.
Is it safe to drive with P04B7?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent contact at connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
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, Fuel Fill Door Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.