What does code P0415 mean?
The ECU detects a malfunction in the electrical circuit of Secondary Air Injection (SAI) switching valve B, preventing correct air flow control during emissions management.
OBD-II Code
P0415 — Secondary Air Injection System Switching Valve B Circuit Malfunction
The ECU detects a malfunction in the electrical circuit of Secondary Air Injection (SAI) switching valve B, preventing correct air flow control during emissions management.
Common symptoms
- Incorrect air flow
- increased emissions
- possible check engine light
Possible causes
- Faulty valve B solenoid
- damaged wiring
- poor electrical connection
Initial recommendation
Inspect valve B solenoid operation, check wiring and connector integrity, replace solenoid if faulty.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0415 with your vehicle's actual symptoms for more complete diagnostic guidance.
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