P04BA
Fuel Fill Door Position Sensor/Switch Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check the fuel fill door for any damage or malfunctions and repair or replace if necessary.
- Inspect and clean the fuel fill door position sensor/switch connections and wiring for any corrosion or loose connections.
- Test and potentially replace the fuel fill door position sensor/switch if it fails to function properly.
- Check for any other related issues or error codes that may be causing the problem.
Common causes
Most likely first
- Faulty fuel fill door position sensor/switch
- Wiring issue or connection problem in the fuel fill door position sensor/switch circuit
- Faulty or loose electrical connection in the fuel fill door position sensor/switch circuit
- Corrosion or damage to the fuel fill door position sensor/switch
- Malfunctioning powertrain control module (PCM) or engine control module (ECM)
How to diagnose & fix
Work through it in order
- Fuel fill door not opening or closing properly
- Fuel filler cap not sealing tightly
- Check engine light illuminated on the dashboard
- Decreased fuel efficiency
- Difficulties in starting the engine
Read & clear P04BA yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.