P04C1

Fuel Fill Door Unlock Control Circuit Low

Severity

✅ Low

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$11–56 (est.)

Symptoms

The fuel filler flap does not open
Check Engine Light on Dashboard
Problems with refueling

Causes

Open or short circuit in wiring harness
Malfunction of the fuel tank flap lock solenoid
Problems with the control unit (ECU)
Corrosion of contacts or connectors

How to Fix

Check the wiring harness for breaks or damage
Check the operation of the fuel tank flap lock solenoid
Check control circuit voltage
Replace faulty components (solenoid, wiring harness, etc.)
Clean contacts and connectors from corrosion

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