P04B5
Fuel Fill Door Stuck Open
Generic OBD-II
Real-world scan data
Seen in
65
scans in the past year
Found in
<0.1%
of scans
<0.1%
of scans that found faults
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check for any debris or obstructions preventing the fuel fill door from closing properly
- Inspect the fuel fill door latch mechanism for any damage or wear, and repair or replace if necessary
- Lubricate the fuel fill door hinge and latch mechanism to ensure smooth operation
- Adjust the fuel fill door alignment to ensure a proper seal and prevent it from sticking open
Common causes
Most likely first
- Damaged or malfunctioning fuel fill door mechanism
- Faulty fuel filler cap
- Broken or stuck fuel fill door release button/lever
- Issues with the fuel fill door locking mechanism
- Obstruction or blockage preventing the fuel fill door from closing properly
How to diagnose & fix
Work through it in order
- Fuel fill door does not open or close properly
- Difficulty in inserting or removing fuel nozzle
- Fuel spillage during refueling
- Malfunctioning fuel cap warning light
- Inability to properly secure the fuel fill door
Read & clear P04B5 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.