EVAP System Switching Valve Performance/Stuck Open

Where it lives

For P2450, the description names the switch as the part involved.

Check these first

• A failed EVAP switching valve stuck open
• An open or short in the switching valve circuit
• A cracked or leaking EVAP hose
• A purge valve that is stuck and holding vacuum

What to do next

1. Inspect the switching valve and connector
2. Command the switching valve with a scan tool and listen for movement
3. Check the valve circuit for opens and shorts
4. Inspect the EVAP hoses for cracks and leaks
5. Replace the switching valve if it does not move
6. Clear the code and retest

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