P04CD
Fuel Fill Door Open Request Sensor/Switch Stuck On
Generic OBD-II
Common symptoms
What you'll notice
- Check if the fuel fill door is physically open and close it securely.
- Inspect the fuel fill door sensor and switch for any signs of damage or obstruction.
- Test the fuel fill door sensor and switch using a multimeter to ensure proper functionality.
- Clean the sensor and switch connections to remove any dirt or corrosion that could be causing the issue.
- If all else fails, consider replacing the fuel fill door sensor and switch to resolve the problem.
Common causes
Most likely first
- Faulty fuel fill door open request sensor/switch
- Loose or damaged wiring connected to the fuel fill door open request sensor/switch
- Defective fuel fill door open request sensor/switch circuit board
- Malfunctioning body control module (BCM) or powertrain control module (PCM)
- Electrical issue or short circuit related to the fuel fill door open request sensor/switch
How to diagnose & fix
Work through it in order
- Fuel fill door does not open or close properly
- Fuel fill door is stuck in the open position
- Fuel fill door warning light illuminates on the dashboard
- Fuel smells in or around the vehicle
- Fuel leakage from the fuel fill door area
Read & clear P04CD yourself
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