Code result
P04DC
Fuel Fill Door Position Sensor Circuit Range or Performance
Moderate severity
What it means
Same as P04B8 with the signal in plausible range yet not matching the actuator command - door reports closed when motor commanded open, or vice versa.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Sensor signal offset against actual position
highOne of the most commonly reported causes for this code — check this first.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P04DC freeNo credit card required