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P04C7

Fuel Fill Door Lock Position Sensor/Switch Circuit Intermittent/Erratic

Generic OBD-II

Common symptoms

What you'll notice

Common causes

Most likely first

  1. Loose or faulty wiring connections related to the Fuel Fill Door Lock Position Sensor/Switch
  2. Malfunctioning Fuel Fill Door Lock Position Sensor/Switch
  3. Damaged or corroded connectors or terminals in the sensor/switch circuit

How to diagnose & fix

Work through it in order

  1. Difficulty or inability to open or close the fuel fill door
  2. Fuel fill door locks and unlocks on its own
  3. Fuel fill door may not lock properly or stay closed
  4. Malfunction indicator lamp (MIL) or check engine light may illuminate
  5. Erratic or intermittent behavior of the fuel fill door lock position sensor/switch circuit

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