P2422
PowertrainEvap Systemmoderate severityEVAP Vent Valve Stuck Closed
What P2422 Means
The EVAP canister vent valve is stuck in the closed position.
Symptoms
- Fuel tank pressure buildup
- Difficulty refueling
- Check engine light
- Hissing from fuel cap area
Common Causes
- Failed vent valve/solenoid
- Blocked vent line
- Debris in valve
- Spider/insect nest in vent
Diagnostic Steps
- Command vent valve open with scan tool
- Listen for solenoid click
- Check vent hose for blockage
Where to start: Replace vent valve solenoid. Inspect vent line for obstruction.
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