EVAP System Purge Control Valve A Performance/Stuck Open

Where it lives

For P04DF, the part to look at first is the valve named here.

Check these first

• A purge control valve A stuck open by carbon
• A failed purge valve A solenoid
• An open or short in the purge valve circuit
• A cracked or disconnected purge hose

What to do next

1. Inspect the purge valve A and its hoses for cracks or disconnection
2. Command the purge valve with a scan tool and listen for it to click
3. Check the purge valve circuit for opens and shorts
4. Remove the valve and check for carbon holding it open
5. Replace the purge valve if it stays open or fails to seal
6. Clear the code and retest

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