P0417AIR System Switching Valve B 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. P0417 means the control circuit of valve B is shorted. As with valve A (P0414), a short to ground keeps the valve open, while a short to supply or a shorted coil overloads the driver, which is then often switched off for the rest of the trip. Subaru names P0417 for its two-valve system, with valve B on bank 2.
- What you may notice
- Check engine light on
- Secondary air inactive on bank 2
- Secondary air readiness not set (emission test)
- Driving normal
- Likely causes
- LikelyCoil of valve B with shorted turns (water ingress)
- PossibleWire chafed against ground or supply
- PossibleConnector corroded
- RareEngine 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.