P2421

EVAP System Vent Valve Stuck Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Increased fuel consumption
Smell of gasoline in the fuel tank area
Unstable engine idling
Dips during acceleration

Causes

Stuck EVAP vent valve
Open or short circuit in valve circuit
Damaged wiring harness
Engine control unit malfunction
Mechanical damage to the valve

How to Fix

Check the condition of the EVAP vent valve
Test the valve electrical circuit
Check valve coil resistance
Replace faulty valve if necessary
Clear error codes and check the system

Related codes

P2422 P2420 P2419