P2441AIR System Switching Valve Stuck Closed (Bank 1)
- 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
- P2441 flags a bank 1 secondary air valve that does not open when commanded, so pump air never reaches the exhaust ports. Toyota documents it on 2005–2009 4.7L V8 (2UZ-FE) models such as 4Runner, Sequoia, Tundra and Land Cruiser: bulletin T-SB-0230-12 traces it to debris from the air pump contaminating the valves and lists it next to faults of the No. 2 valves. Subaru names P2441 for the 2011–2015 WRX STI and tells technicians to run the diagnosis for the opposite bank as well, since the root cause may sit there. On systems with a pressure sensor the duct pressure then rises unusually high while the oxygen sensor sees no extra air. Seized valves, a faulty actuator and carbon build-up are common causes. P2440 is the stuck-open partner, P2443 the bank 2 code.
- What you may notice
- Check engine lamp after a cold start
- Higher cold-start emissions, failed readiness check
- Likely causes
- LikelyValve seized closed by debris or corrosion
- PossibleValve actuator, control solenoid or vacuum supply faulty
- RareKinked or collapsed air hose downstream of the valve
- 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: €120 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.