OBD-II Code · Powertrain
P2422
EVAP Vent Valve Stuck Closed
Severity
low
Lowest on our scale. Fix it when convenient.
Can you drive it
Only if running normally
A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety.
Indicative cost (USD)
$100–$400
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
EVAP vent valve is stuck closed — tank can't equalize.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Difficulty refueling
- Pump shut-off clicks at gas station
- Check engine light
Likely causes
- Stuck vent solenoidMost common
- Spider or debris in vent line
- Failed valve
Read the full diagnostic procedureP2422 sets when the EVAP system monitor runs a vent-valve seal test and determines the canister vent solenoid is stuck in the closed position, which…
P2422 sets when the EVAP system monitor runs a vent-valve seal test and determines the canister vent solenoid is stuck in the closed position, which prevents fresh air from entering the charcoal canister during purge and pressurizes the tank instead of allowing the calibrated airflow the monitor expects. The vent valve lives at the back of the vehicle near the canister and spends its life caked in road grime and water spray.
Cheapest-first ladder
- command the vent valve open and closed with a bidirectional scan tool and listen for the click, then if there is no click pull the connector and ohm the solenoid coil (typically 20 to 40 ohms) and check for 12V on the supply wire with key on.
- If the valve clicks electrically but still fails the monitor, the problem is mechanical, which on this exact code is almost always mud, leaves, or a wasp nest blocking the vent inlet filter, or internal corrosion seizing the valve plunger.
- Caveat: do not condemn the valve until you have visually inspected the vent inlet and the canister itself, because a saturated or contaminated canister will mimic the same failure.
Vehicle-specific patterns2005-2013 GM trucks and SUVs (Silverado, Tahoe, Equinox) are notorious for spider webs and mud plugging the vent filter mounted near the spare tire,…
- 2005-2013GM trucks and SUVs (Silverado, Tahoe, Equinox) are notorious for spider webs and mud plugging the vent filter mounted near the spare tire, and the fix is often a cleaning rather than parts.
- 2007-2014Ford F-150 and Expedition see the vent valve itself corrode shut from being mounted directly to the canister behind the rear wheel.
- 2006-2012Jeep Wrangler and Liberty trap water in the vent valve from off-road use.
- 2008-2015Subaru Outback and Forester have a known issue where the canister itself absorbs water and the vent valve plunger sticks.
Estimated repair$80 to $320.
Look up another code
P2422 — frequently asked
What does a P2422 code mean?
EVAP vent valve is stuck closed — tank can't equalize.
What causes a P2422 code?
Common causes: Stuck vent solenoid; Spider or debris in vent line; Failed valve.
What are the symptoms of a P2422 code?
Typical symptoms: Difficulty refueling; Pump shut-off clicks at gas station; Check engine light.
Is it safe to drive with a P2422 code?
Only if running normally. A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety. Estimated repair: $100-$400.
How do I diagnose a P2422 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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