P0413 on 2006-2014 Subaru WRX — Secondary Air Injection System Switching Valve "A" Circuit Open
1 vehicles · 1 makes · $700-$2,200 repair
Most Reported On
P0413 is an OBD-II diagnostic trouble code meaning “Secondary Air Injection System Switching Valve "A" Circuit Open.” This code indicates the PCM detected an open electrical circuit for secondary air injection switching valve 'A'. The secondary air injection system pumps fresh air into the exhaust during cold starts to help the catalytic converter heat up quickly and reduce emissions. An open circuit means the valve isn't being controlled properly, which mainly affects cold-start emissions. It usually causes a check engine light without major driveability symptoms. This code is most commonly reported on 2006-2014 Subaru WRX, with repair costs ranging from $700 to $2,200.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0413, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
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BlueDriver Pro Bluetooth Scanner
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Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
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LAUNCH CRP123X OBD-II Scanner
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A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
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Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
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- Oil reset, EPB, BMS, TPMS, injector coding
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FAQ
What does P0413 mean?
P0413 stands for "Secondary Air Injection System Switching Valve "A" Circuit Open." This code indicates the PCM detected an open electrical circuit for secondary air injection switching valve 'A'. The secondary air injection system pumps fresh air into the exhaust during cold starts to help the catalytic converter heat up quickly and reduce emissions. An open circuit means the valve isn't being controlled properly, which mainly affects cold-start emissions. It usually causes a check engine light without major driveability symptoms.
What are the most common causes of P0413?
The most common causes of P0413 are: Faulty secondary air injection switching valve, Open or broken wiring in the valve circuit, Corroded or disconnected electrical connector, Blown fuse or relay feeding the valve, Poor ground or loss of power to the valve, Failing PCM (less common). The specific cause varies by vehicle.
How much does it cost to fix P0413?
Repair costs for P0413 range from $700 to $2,200, depending on the vehicle and root cause.
Which vehicles are affected by P0413?
Au7o has documented P0413 across 1 vehicle models from 1 manufacturers: Subaru.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.