P2441: How to Diagnose & Fix — Secondary Air Injection System Switching Valve Stuck Closed (Bank 1)
7 vehicles · 4 makes · $300-$3,000 repair
How to diagnose and fix P2441: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Lexus GX · 2003–2009
The secondary air injection (SAI) system pump and switching valves fail due to moisture intrusion and corrosion. The SAI pump introduces fresh air into the exhaust during cold starts to reduce emissions, but the pump motor corrodes internally and the switching valves stick. This triggers a check engine light with SAI-related codes.
Common Symptoms
- Check engine light with P2440/P2441/P2442 codes
- Rough idle on cold start
- Failed emissions inspection
- Whirring noise from passenger side of engine on cold start
How to Fix
Replace the secondary air injection pump and switching valves. Clean or replace the air injection check valves. Clear codes and verify operation. Some owners in non-emissions-testing states choose to bypass the system entirely with a tune.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- 17600-0F010 genuine Lexus secondary-air injection pumpOEM17600-0F010
Replace a commanded-test-confirmed failed secondary-air pump Fitment/availability: Live page explicitly fits 2004-2009 GX470 2UZ-FE/UZJ120. It does not verify the issue's 2003 year.
- 25710-50022 genuine Lexus secondary-air switching/diverter valveOEM25710-50022
Replace the diagnosed failed main air-switching/diverter valve Fitment/availability: Live page explicitly fits 2004-2009 GX470 2UZ-FE and supersedes 25710-50020/21.
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Owner tips & cautions
- TipReplace both the pump AND the switching valves at the same time — if one has failed, the other is likely close behind. The valves are $150 each but save a second repair.
Toyota Sequoia · 2008–2019
2nd-gen Sequoias with the 5.7L 3UR-FE also suffer from secondary air injection pump failures, similar to the 1st gen but with updated part numbers. The pump seizes from internal moisture corrosion, triggering P2440-P2445 codes and check engine light.
Common Symptoms
- Check engine light with P2440-P2445 codes
- Loud buzzing or grinding on cold start
- Air pump not engaging on startup
- Failed emissions test
How to Fix
Replace secondary air injection pump (Toyota 17610-0S010 or Dorman 306-058). Replace air switching valves if corroded. Aftermarket pumps are available at lower cost. Some owners install check valves in the air line to prevent moisture backflow into the pump.
Sources for this issue (2)
Toyota Land Cruiser · 2008–2021
The secondary air injection system on the 200 Series Land Cruiser (3UR-FE and later engines) fails due to moisture intrusion and corrosion of the air switching valves and pump motor. The system pumps air into the exhaust manifold during cold starts to reduce emissions. When it fails, it triggers check engine lights and can prevent the vehicle from passing emissions testing.
Common Symptoms
- Check engine light on cold starts
- Rough idle for first 30-60 seconds
- Whirring noise from engine bay on startup
- Failed emissions inspection
- Multiple air injection fault codes
How to Fix
Replace the air injection pump, air switching valves, and check valves. Clean or replace corroded wiring connectors. Some owners delete the system entirely with aftermarket tune, though this prevents passing emissions in tested states.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Toyota 17610-0S010 genuine secondary-air pump assembly
early pump branch, replacing only the unit proven failed by command and electrical/flow testing Fitment/availability: VIN- and production-date-confirmed 2008 through early-2013/2014 Land Cruiser 3UR-FE branch; catalog requires quantity t…
- Toyota 17610-0S030 genuine secondary-air pump assembly
later pump branch after component-specific diagnosis Fitment/availability: VIN- and production-date-confirmed late-2013 through 2021 Land Cruiser 3UR-FE branch; catalog requires quantity two Fitment/availability: Live direct product page…
- Toyota 25701-38064 genuine electric air-control valve assembly
replace only after active testing proves the electric valve is stuck, leaking or electrically failed Fitment/availability: VIN-confirmed 2008-2021 Land Cruiser 3UR-FE catalog branch; exact production supersession and associated gaskets m…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipRequest the updated air switching valve design per TSB-0111-10 when replacing - the revised valves have better moisture sealing.
- WarningDeleting the air injection system will cause a permanent CEL and emissions test failure. Only viable in non-emissions states.
Sources for this issue (2)
Subaru WRX STI · 2008–2014
Toyota Tacoma · 2012–2015
Find P2441 by make
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P2441 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2441 mean?
P2441 stands for "Secondary Air Injection System Switching Valve Stuck Closed (Bank 1)." P2441 indicates the secondary air injection system switching valve on bank 1 is stuck closed. The secondary air injection system pumps fresh air into the exhaust during cold starts to help the catalytic converter heat up and burn off pollutants faster; a switching valve controls that airflow. When the PCM commands the valve open but airflow doesn't occur as expected, it concludes the valve is stuck closed. This mainly affects cold-start emissions and will fail an emissions test, though drivability is usually normal.
What are the most common causes of P2441?
The most common causes of P2441 are: Stuck or seized secondary air switching valve (bank 1), Carbon or rust buildup clogging the valve or air passages, Failed vacuum/control solenoid for the valve, Damaged vacuum lines or electrical connector to the valve, Faulty secondary air injection pump, Wiring fault in the valve control circuit, Moisture/corrosion in the air injection plumbing. The specific cause varies by vehicle.
How much does it cost to fix P2441?
Repair costs for P2441 range from $300 to $3,000, depending on the vehicle and root cause.
Which vehicles are affected by P2441?
Au7o has documented P2441 across 7 vehicle models from 4 manufacturers: Lexus, Subaru, Toyota, Volkswagen.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.