P2445: Secondary Air Injection System Pump Stuck Off (Bank 1)
Severity: medium
What it means: The engine computer sees too little airflow from the secondary air injection pump on bank 1, as if the pump isn't running when commanded.
Safe to drive? Usually yes for short-term driving, but some vehicles drop into reduced power after a cold start. Get it fixed before an emissions inspection.
Common symptoms
- Check-engine light after a cold start
- Reduced power on some vehicles
- Often set with P2440 or P2444
Likely causes, ranked
- Failed or seized air injection pumpShop
- Air injection pump relay, fuse or driver faultShop
- Blocked or leaking air hosesShop
- Stuck air switching valveShop
Vehicle-specific notes
- 2005–2006 Toyota Tundra: 4.7L (2UZ-FE): Toyota bulletin T-SB-0230-12 Rev1 was updated in 2013 to add P2445 and diagnosis of the air injection control driver. It also covers 2005–2009 4Runner, 2005–2007 Sequoia and 2006–2007 Land Cruiser. · Source
- 2005–2007 Toyota Sequoia: 4.7L (2UZ-FE): Toyota bulletin T-SB-0230-12 Rev1 covers P2445 and related air injection codes. · Source
What it means: The engine computer sees too little airflow from the secondary air injection pump on bank 1, as if the pump isn't running when commanded.
Severity: Medium. Safe to drive? Usually yes for short-term driving, but some vehicles drop into reduced power after a cold start. Get it fixed before an emissions inspection.
DIY or shop?
Usually a shop job. Check the pump fuse and relay first, and look for bulletins and Toyota warranty extensions.
Before you replace parts
- Read all stored codes and freeze-frame data. Fix misfire, fuel or sensor codes before chasing emissions codes.
- Check the simple things first: connectors, vacuum hoses, fluid levels and the gas cap.
- Clear the code only after a repair, then confirm it stays off after a few drives.
- Check your VIN for recalls and service bulletins.
Safety / mechanic note
Verify with a mechanic if you notice drivability changes, warning lights or overheating. A code points to a circuit or system, not always a specific part.