P04B7

Fuel Fill Door Position Sensor/Switch Circuit Intermittent/Erratic

Severity

✅ Low

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$22–89 (est.)

Symptoms

The 'Check Engine' light is on
EVAP system errors
Problems with refueling (in some models)
False warnings about an open tank cap

Causes

Malfunction of the fuel tank cap position sensor
Open or shorted wiring harness
Oxidation or corrosion of contacts
Problems with connectors
Engine control unit malfunction

How to Fix

Visual inspection of the sensor and wiring harness
Check contacts for corrosion or damage
Sensor Resistance Testing
Checking the integrity of the wiring harness
Replace the sensor if necessary
Cleaning or repairing contacts
Resetting the error code and checking the system

Related codes

P0455 P0456 P0457