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P2441MinorEmissions

P2441: How to Diagnose & Fix — Secondary Air Injection System Switching Valve Stuck Closed (Bank 1)

8 vehicles · 4 makes · $300-$3,000 repair

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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

Community reported
2,200 owners
Link to this issueError Codes:P2440P2441P2442

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 pump
    OEM17600-0F010

    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.

    LexusPartsNow
  • 25710-50022 genuine Lexus secondary-air switching/diverter valve
    OEM25710-50022

    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.

    LexusPartsNow

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

  • 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.
Typical repair cost:$800 - $2,000

Research This Issue

Based on 2,200 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence2,200 owner reportsLast reported by owners Aug 2025Reviewed Mar 2026

Toyota Sequoia · 2008–2019

Community reported
1,100 owners
Link to this issueError Codes:P0410P0411P0412P0418P2440P2441P2442P2443P2444P2445

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.

Typical repair cost:$300 - $1,500

Research This Issue

Based on 1,100 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence1,100 owner reportsLast reported by owners Feb 2026Reviewed Feb 2026

Toyota Land Cruiser · 2008–2021

Community reported
245 owners
Link to this issueError Codes:P2440P2441P2442P2443

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. Toyota TSB-0111-10 addresses the updated valve design.

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…

    ToyotaPartsDeal
  • 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…

    ToyotaPartsDeal
  • 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…

    Capistrano Valley Toyota Parts

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.
Typical repair cost:$300 - $1,800

Research This Issue

Based on 245 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence245 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026

Subaru WRX STI · 2008–2014

Community reported
220 owners
Link to this issueError Codes:P0410P2440P2441P2442P2443

Subaru WRX STI models equipped with the EJ257 and secondary air injection commonly develop failures of the air pump and/or the air switching valves, often due to moisture intrusion and internal corrosion that causes the valves to stick. Owners typically see a check engine light with cold-start drivability changes and may fail emissions/inspection due to stored air injection codes. This issue is widely documented in owner reports and Subaru service information/TSBs covering secondary air injection diagnostics and component replacement.

Common Symptoms

  • Check Engine Light on after cold start
  • DTCs P0410, P2440/P2441/P2442/P2443 stored
  • Rough or high idle on cold start
  • Failed emissions/inspection readiness
  • Whining or abnormal noise from air pump area

How to Fix

Diagnose with scan tool and active tests; replace failed air pump and/or air switching valves and related hoses/gaskets. Common components include the secondary air pump and air switching valves (bank-specific); replace any water-damaged connectors and ensure updated routing/sealing per Subaru service guidance (refer to Subaru TSBs addressing secondary air injection DTCs for applicable years).

What you need to diagnose it

The repair instructions explicitly call for reading stored codes. Use a scanner that can read the named code families before choosing a repair.The recommended scanner supports these code families; confirm your exact year, model and module coverage before buying.

  • ANCEL AD310 Classic OBD-II Scanner

    Read & clear engine (P) codes

    $20–$40View

As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.

Reading and clearing the code is DIY work. Module replacement or reprogramming is not — most modules are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.

Typical repair cost:$600 - $2,200
Sources for this issue (1)
  • CarComplaints.com — Subaru Impreza owner complaints (includes WRX/STI years; search within for secondary air injection pump/valve failures and related CEL codes)owner-report

Research This Issue

Based on 220 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence220 owner reportsReviewed Apr 2026

Subaru WRX · 2006–2014

Link to this issueError Codes:P0410P0411P0413P0414P0418P2431P2440P2441P2444

Turbo EJ255/EJ257 WRX models equipped with the secondary air injection system commonly develop failures of the air pump, pressure sensor, or the air switching valves. Moisture intrusion and corrosion can cause the valves to stick or the pump to seize, which sets emissions faults and on many cars can reduce power or force a limp-home condition. Owners typically report a check-engine light shortly after cold start, often with rough cold operation or an audible pump noise before failure.

Common Symptoms

  • check engine light after cold start
  • reduced power or limp mode
  • loud buzzing or whining from air pump area
  • rough cold start
  • failed emissions inspection

How to Fix

Diagnosis usually starts with scanning for secondary air system codes and commanding the pump/valves with a capable scan tool. Repair typically involves replacing one or both air switching valves, the pump, and sometimes the pressure sensor or related hoses; some owners also inspect for water entry and update gaskets/hoses during repair. Because access is tight on turbo models, labor can be significant, and clearing codes without fixing the root cause usually results in repeat faults.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Subaru 14828AA060 Secondary Air Pump Assembly

    early pump branch only after bidirectional testing proves the pump itself failed Fitment/availability: 2007 WRX and 2007 STI turbo secondary-air system; also cataloged for 2007-2008 Forester XT, confirm VIN Fitment/availability: Ships di…

    Subimods
  • Genuine Subaru 14828AA050 Secondary Air Injection Pump Assembly

    later pump branch only after bidirectional testing proves the pump itself failed Fitment/availability: 2008-2014 WRX and 2008-2021 STI; this canonical card uses it only for the 2008-2014 WRX/STI overlap, confirm VIN Fitment/availability:…

    Subimods

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

  • TipUse an OBD-II scanner that can read Subaru-specific pending/history codes and active test the air pump/valves before buying parts.
Typical repair cost:$700 - $2,200

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceReviewed Invalid Date

Find P2441 by make

Browse every documented model and issue for your make.

Lexus · 1 issueSubaru · 2 issuesToyota · 5 issuesVolkswagen · 1 issue

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 8 vehicle models from 4 manufacturers: Lexus, Subaru, Toyota, Volkswagen.

Related codes

  • P2440 · Secondary Air Injection System Switching Valve Stuck Open (Bank 1)
  • P2442 · Secondary Air Injection System Switching Valve Stuck Open (Bank 2)
  • P2443 · Secondary Air Injection System Switching Valve Stuck Closed (Bank 2)
  • P2444 · Secondary Air Injection System Pump Stuck On (Bank 1)
  • 01447 · EVAP System (VAG)
  • P0030 · HO2S Heater Control Circuit (Bank 1 Sensor 1)
  • P0031 · HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
  • P0037 · HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
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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.

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