P04B8

Fuel Fill Door Position Sensor/Switch Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$22–89 (est.)

Symptoms

Check Engine Light Is On
Error when checking the tightness of the EVAP system
Possible problems with fuel refueling

Causes

Cover position sensor/switch malfunction
Open or shorted wiring harness
Poor contact in the sensor connector
Mechanical damage to the fuel tank cap
Problems with the engine control unit

How to Fix

Visual inspection of the fuel tank cap and sensor
Checking the integrity of the wiring harness and contacts
Testing the sensor with a multimeter
Replacing a faulty sensor or cover
Clearing error codes and checking the system

Related codes

P0442 P0455 P0456