P2422EVAP System Vent Valve Stuck Closed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2422 is the opposite case: the vent path stays shut even with the valve commanded open, so tank pressure or vacuum cannot equalise. GM's Volt table (16OBDG01) is specific: with more than 697 Pa of pressure or vacuum in the sealed tank, the diurnal control valve is opened, and a fuel tank pressure change of less than 249 Pa within 10 s fails the test, Type B. Honda (bulletin 15-010, 2013-2015 Accord; later Ridgeline and Pilot) blames dirt that plugs the vent tube of the canister and fits a new canister plus tube. Hyundai revised the detection logic for the 2020 Sonata 2.5 GDI by ECM update (campaign 962), and Porsche and Bentley plug-in hybrids use it for the tank isolation valve. Refuelling may become difficult.
- What you may notice
- Check engine light
- Fuel nozzle shuts off early when refuelling
- Hissing when the fuel cap or flap is opened
- Likely causes
- LikelyDust, dirt or insects blocking the canister vent tube or filter
- PossibleVent valve or tank isolation valve stuck closed
- RareDetection logic needing an update (Hyundai 2020 Sonata)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.