P0414 on 2006-2014 Subaru WRX — Secondary Air Injection System Switching Valve "A" Circuit Shorted
1 vehicles · 1 makes · $700-$2,200 repair
Most Reported On
P0414 is an OBD-II diagnostic trouble code meaning “Secondary Air Injection System Switching Valve "A" Circuit Shorted.” This code means the PCM detected a short in the control circuit for secondary air injection switching valve 'A'. The secondary air system injects fresh air into the exhaust on cold starts to speed catalytic converter warm-up and lower emissions. A shorted circuit prevents proper valve control and mainly impacts cold-start emissions performance. It typically illuminates the check engine light with minimal driveability effect. 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 P0414, 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
by BlueDriver
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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- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
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- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
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.
- All-system diagnostics (25+ modules)
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- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P0414 mean?
P0414 stands for "Secondary Air Injection System Switching Valve "A" Circuit Shorted." This code means the PCM detected a short in the control circuit for secondary air injection switching valve 'A'. The secondary air system injects fresh air into the exhaust on cold starts to speed catalytic converter warm-up and lower emissions. A shorted circuit prevents proper valve control and mainly impacts cold-start emissions performance. It typically illuminates the check engine light with minimal driveability effect.
What are the most common causes of P0414?
The most common causes of P0414 are: Faulty secondary air injection switching valve, Wiring shorted to power or ground, Damaged or chafed wiring harness, Corroded or shorted connector terminals, Internal valve solenoid short, Failing PCM (less common). The specific cause varies by vehicle.
How much does it cost to fix P0414?
Repair costs for P0414 range from $700 to $2,200, depending on the vehicle and root cause.
Which vehicles are affected by P0414?
Au7o has documented P0414 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.