P2422moderate severityPowertrain
EVAP Vent Valve Stuck Closed
on 2008 Audi R8 4.2L V8 · AWD
What this code 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
Repair notes
Replace vent valve solenoid. Inspect vent line for obstruction.
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