P04B0

Refueling Vapor Control Valve Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
The smell of fuel in the cabin or around the car

Causes

Broken or damaged wires in the valve circuit
Fuel vapor control valve malfunction
Problems with the relay or circuit fuse
Engine control module (ECU) malfunction

How to Fix

Check the integrity of wires and connectors in the valve circuit
Check the resistance of the fuel vapor control valve
Check the functionality of the relays and fuses
If necessary, replace the valve or repair the wiring
Reset the error code and check if it appears again

Related codes

P0440 P0441 P0442