Fuel Fill Door Open Request Sensor or Switch Circuit Intermittent or Erratic
Same as P04C8 with intermittent or erratic signal - typically a connector or harness fault. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Affected components
- Fuel fill door request switch
- Fuel fill door wiring
Common causes
- High likelihood: Intermittent contact at connector
- Low likelihood: Connector with intermittent contact under vibration
- Low likelihood: Harness routed against vibrating component
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.