P04BFFuel Fill Door Unlock Control Circuit Open
The fuel fill door has a powered lock that secures it against tampering and against opening at high speed. The lock control line is open - the ECU cannot drive the lock solenoid, leaving it in its mechanical default state.
Can I keep driving? Yes
You can keep driving normally. Schedule a check soon so emissions and performance are not affected.
Sistema Afectado
Sistema de Escape · Catalizador y sensores O₂
La falla se localiza en la línea de escape: catalizador, sondas lambda (O₂) o sistema EGR.
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Possible Causes
The components or conditions that trigger this code
- 1Open in harness or actuator winding Pin pushed back out of connector body Cracked solder joint inside the module or sensor
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Difficulty: easy. Estimated time: 0.5-1.4 hours. Estimated cost: €80-€
- 2DIY possible
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Varies by diagnosis
* Diagnosis only: $50–$150
Quick Info
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