P04C3

Fuel Fill Door Lock Position Sensor/Switch Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–56 (est.)

Symptoms

Check Engine Light Is On
Problems with opening/closing the fuel filler flap
Errors in the EVAP system

Causes

Open or short circuit in the sensor circuit
Lock position sensor malfunction
Wiring harness damage
Contact corrosion
Problems with the control unit (ECU)

How to Fix

Check the integrity of the wiring harness and contacts
Check the resistance of the lock position sensor
Replace sensor if necessary
Clean contacts from corrosion
Check the operation of the EVAP system

Related codes

P0442 P0455 P0456