P04CD

Fuel Fill Door Open Request Sensor/Switch Stuck On

Severity

✅ Low

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$11–56 (est.)

Symptoms

False fuel cap warning
Check Engine light comes on
Problems with the EVAP system

Causes

Fuel cap sensor malfunction
Sensor circuit short circuit
Wiring Harness Problems
ECU software stuck

How to Fix

Check the operation of the fuel tank cap
Check the sensor and its circuit for short circuits
Replace sensor if necessary
Update ECU software

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