- Code
- P2422
- Applies To
- Most makes, generic code
- Loose Cap Can Set It
- Not named in our sources
- Typical Fix
- $182 at YourMechanic
- The canister vent valve seems stuck shut, or its fresh air path is blocked.
- A shop confirms it with the carmaker's EVAP test and a smoke machine before replacing parts.
- Usually yes for now, but get it fixed soon and check for open recalls.
What The Carmakers Call It
- EVAP canister vent shut valve stuck closed malfunction, as printed by American Honda Motor Co.
- Evaporative Emission System Vent Valve Stuck Closed, as printed by Kia
Causes Named In Carmaker Bulletins
- Dirt clogging the EVAP canister vent tube (2017 to 2020 Ridgeline) (source)
- Dirt clogging the EVAP canister vent tube (2013 to 2017 Accord and some Accord Hybrid) (source)
- Repeat codes when driving often on dry, dusty dirt roads (source)
- A spider nest or other object in the vent hose between the filler neck and canister (2017 and later Sportage) (source)
No source ranks these by how often they happen, so they are listed as the bulletins give them.
No source ties P2422 to the gas cap.
Honda's fix is to inspect the vent tube and, if needed, replace the canister and add a drain kit with a filter box. Honda lists 0.8 hour for the job on the Ridgeline. The brief also mentioned Toyota for P2422, we found Honda and Kia sources only.
What The Fix Costs
The usual part for this code is the vent valve. Published estimates put it at $182 at YourMechanic. The full table with every source and date is on the cost page. A diagnosis first keeps you from paying for a part you did not need, which is why we price what to do after a failed smog check before the fix.
Getting The Light To Go Off
After the repair the light goes off once the EVAP test runs and passes on three drive cycles in a row, and the code is erased after 40 warm up cycles, per CARB. The test only runs under set conditions such as a fuel level between about 15 and 85 percent, so it can take days.
Related Codes
Author Source EEAT Authors · Anthony's Author Page
Sources For This Page
- Service Bulletin 20-002, MIL Comes On with DTC P2422, Ridgeline (March 3, 2020), American Honda Motor Co., read 2026-11-12
- Service Bulletin 15-010 Version 4, MIL Comes On with DTC P2422, Accord (February 17, 2017), American Honda Motor Co., read 2026-11-12
- Tech Line ATS 160701, P2422 on dirt roads (July 2016), American Honda Motor Co., read 2026-11-12
- TSB PS532 Rev 1, DTC P0449 and P2422, Sportage (December 5, 2018), Kia, read 2026-11-12
- 13 CCR 1968.2, Malfunction and Diagnostic System Requirements, OBD II, California Air Resources Board (via Cornell LII), read 2026-11-12
- Evaporation Vent Solenoid Replacement, YourMechanic, read 2026-11-12