What Does P2422 Mean?
The PCM has detected that the EVAP vent valve is stuck in the closed position. The system cannot properly vent to atmosphere during normal operation or purge cycles.
Common Causes
40%
Mechanically stuck EVAP vent valve in closed position
25%
Blocked or collapsed vent hose preventing atmospheric venting
20%
Failed vent valve solenoid stuck energized
10%
Plugged vent filter restricting airflow
5%
Electrical short keeping valve constantly energized closed
Diagnostic Steps
1
Step 1: Locate EVAP vent valve and filter assembly and inspect vent filter for blockage or contamination
2
Step 2: Command vent valve open using scan tool and verify valve de-energizes (should hear click)
3
Step 3: Disconnect vent hose and verify free airflow through filter and vent line to atmosphere
4
Step 4: Test vent valve by applying vacuum - should hold vacuum when closed, release when open
5
Step 5: Check for pinched or kinked vent hoses along routing path from canister to atmosphere
Estimated Repair Cost
$120 - $400
Parts + labor, varies by vehicle and location
The PCM has detected that the EVAP vent valve is stuck in the closed position. The system cannot properly vent to atmosphere during normal operation or purge cycles.
The most common cause of P2422 (Evaporative Emission System Vent Valve Stuck Closed) is: Mechanically stuck EVAP vent valve in closed position
Typical repair costs for P2422 range from $120 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Generally safe to drive. May experience fuel tank pressurization, difficult refueling, or fuel cap hissing when removed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2422 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Generic (SAE)
Recommended Tools
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