P2447 on 2005-2011 Toyota Tacoma — Secondary Air Injection System Pump Stuck Off (Bank 2)
1 vehicles · 1 makes · $1,200-$3,000 repair
Most Reported On
P2447 is an OBD-II diagnostic trouble code meaning “Secondary Air Injection System Pump Stuck Off (Bank 2).” This code means the engine computer detected that the secondary air injection (SAI) pump for Bank 2 appears stuck off - it is not delivering the expected airflow when commanded on. The SAI system injects fresh air into the exhaust during cold starts to reduce emissions until the catalytic converter warms up. If the pump isn't producing flow, cold-start emissions rise and the system fails its self-test. This is primarily an emissions issue rather than a driving hazard, but it will keep the check engine light on and can cause inspection failures. This code is most commonly reported on 2005-2011 Toyota Tacoma, with repair costs ranging from $1,200 to $3,000.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P2447, 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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- I/M readiness status
- No batteries or app needed
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)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P2447 mean?
P2447 stands for "Secondary Air Injection System Pump Stuck Off (Bank 2)." This code means the engine computer detected that the secondary air injection (SAI) pump for Bank 2 appears stuck off - it is not delivering the expected airflow when commanded on. The SAI system injects fresh air into the exhaust during cold starts to reduce emissions until the catalytic converter warms up. If the pump isn't producing flow, cold-start emissions rise and the system fails its self-test. This is primarily an emissions issue rather than a driving hazard, but it will keep the check engine light on and can cause inspection failures.
What are the most common causes of P2447?
The most common causes of P2447 are: Failed or seized secondary air injection pump, Blown fuse or faulty relay for the air pump, Wiring or connector fault to the pump, Stuck-closed air switching/check valve, Clogged or disconnected air injection hose, Water or debris damage to the pump. The specific cause varies by vehicle.
How much does it cost to fix P2447?
Repair costs for P2447 range from $1,200 to $3,000, depending on the vehicle and root cause.
Which vehicles are affected by P2447?
Au7o has documented P2447 across 1 vehicle models from 1 manufacturers: Toyota.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.