P2442AIR System Switching Valve Stuck Open (Bank 2)
- 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
- P2442 is the stuck-open fault of the bank 2 secondary air valve: with the pump on and the valve commanded shut, air still passes, or exhaust flows back towards the pump. Lexus applies it to the 2010–2013 GX 460 with the 1UR-FE engine; bulletin L-SB-0028-14 replaces the bank 2 air switching valve and the pump, because a damaged pump filter sheds debris. Toyota's T-SB-0033-17 does the same for the 2012 Tacoma 4.0L V6 (1GR-FE) when P2440, P2442 or P2445 are stored. Subaru lists P2442 for the 2011–2015 WRX STI. Hot exhaust gas passing an open path can melt hoses and ruin the pump, so the fault should not be left for long. Bank 1 uses P2440, the stuck-closed counterpart is P2443.
- What you may notice
- Check engine lamp after a cold start
- Pump noise or later pump failure
- Melted or brittle air hoses
- Likely causes
- LikelyBank 2 valve held open by debris from the pump filter
- PossibleValve seat or diaphragm damaged by heat or condensate
- RareActuator does not close 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 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.