P0414AIR System Switching Valve A Circuit Shorted
- 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
- The switching valve is the electrically driven valve of this path – a solenoid valve, or on Pierburg/VW systems an electric changeover valve that applies vacuum to the pneumatic combination valve; valve A serves the first path or bank 1, valve B the second. P0414 means the control circuit of valve A is shorted. A short to ground keeps the valve energized and open; a short to supply or a shorted coil overloads the driver, which many modules then switch off for the rest of the trip. An open valve with the pump running can also set P2440, and exhaust can reach the pump if the check valve leaks. Subaru names P0414 in its bulletin for the two-valve system.
- What you may notice
- Check engine light on
- Secondary air inactive
- Secondary air readiness not set (emission test)
- Driving normal
- Likely causes
- LikelyValve coil with shorted turns (water ingress)
- PossibleWire chafed against ground or supply
- PossibleMoisture or corrosion in the connector
- RareDriver in the engine module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.