P2451

EVAP System Switching Valve Stuck Closed

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

The smell of gasoline in or around the car
Difficulty starting the engine
Increased pressure in the fuel tank
Check Engine light comes on
Poor engine performance at idle

Causes

EVAP switch valve malfunction
Valve is dirty or clogged
Problems with wiring to the valve
Engine control unit malfunction
Mechanical damage to the valve

How to Fix

Check EVAP valve power supply circuit
Check valve resistance
Clean or replace EVAP valve
Check for fault codes in the control unit
Test the operation of the EVAP system after repair

Related codes

P0440 P0441 P0446