Powertrain
generic / SAE
P04CD
Fuel Fill Door Open Request Sensor or Switch Stuck On
The open-request switch is stuck in the active state - the ECU continuously reads a request to open the fuel fill door. Either the switch is mechanically held closed or the line is shorted to its active level.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / CD
Possible causes
- Switch contact mechanically stuck closed high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 60–220 €
- Estimated time: 0.4–1 h
- Component: fuel fill door request switch
Sources
References
sae:J2012