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P04B6

Fuel Fill Door Stuck Closed

Same as P04B5 with the door stuck closed - the user cannot refuel until the fault is cleared.

  • Check engine light: Not always
  • Emissions related: No
  • Repair difficulty: easy

Common causes

Ordered by how often each turns out to be the cause.

  • Latch jammed or actuator stalledCommon
  • Carbon or debris buildup preventing free movementLess likely
  • Component wear with age - mechanical playLess likely

Parts involved

  • Fuel Fill Door
  • Fuel Fill Door Actuator

P04B6 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.