P1445 On Toyota, secondary air switching valve No. 2 stuck closed (bank 2)

Secondary air injection switching valve No. 2 stuck close, bank 2

Severity not verified — if the car runs badly, have it inspected

The fault affects fresh air fed to the exhaust during warm-up, mainly an emissions matter, but we found no source that rates how safe it is to keep driving.

Source: how we rate severity

P1445 in short

On Toyota, P1445 means the secondary air system switching valve No. 2 on bank 2 is stuck closed, so fresh air does not reach the exhaust after a cold start. Debris from the air pump is a known cause on 4.7 L V8 trucks. No safety source was found; have it checked.

Toyota names this code as the secondary air injection system switching valve No. 2, stuck closed, on one cylinder bank. After a cold start the system pumps fresh air into the exhaust to warm the catalysts faster, and the valve opens the path.

Toyota bulletin T-SB-0230-12 covers 2UZ-FE 4.7 L engines in the 4Runner, Land Cruiser, Sequoia and Tundra, and says debris passing through the air injection pump can contaminate components in the system. Toyota's own training article notes that a damaged pump means the air valves should be checked for debris.

The computer judges the valve by whether a pressure sensor sees exhaust pulses when the valve is commanded open, so a valve that sticks closed shows up as no pulses.

Pick your make

P1445 is a manufacturer-specific code: its meaning depends on who built the car.

Other makes: meaning not verified. Check with a scan tool that reads manufacturer definitions.

Most likely causes

  1. Debris from the air pump contaminating the valves

    Supported by vehicle data
    Why it ranks here
    Toyota T-SB-0230-12 lists this code with others on 2UZ-FE engines and says debris passing through the pump can contaminate the system. The bulletin status is unverified.
    What would change this
    Rises if the pump is noisy or damaged or debris is found in the valves or lines. Falls if the lines and valves are clean.
    How to test the secondary air pump

  2. Switching valve stuck closed or failed

    Supported by vehicle data
    Why it ranks here
    Toyota's training article says the valve is judged by pressure sensor pulses, and a closed valve shows no pulses. The code name itself says stuck closed.
    What would change this
    Rises if the valve fails the scan tool active test or the pressure sensor shows no pulses. Falls if the valve opens and the pulses appear.

  3. Air pump, relay or control driver fault

    Possible — needs testing
    Why it ranks here
    The training article describes a noisy or open-circuit pump and a defective air driver on a similar Toyota V8, so these sit behind the valve cause.
    What would change this
    Rises if other air pump codes such as P0418 are stored or a pump test fails. Falls if the pump runs and draws normal current.
    How to test the secondary air pump

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read all codes and note other secondary air codes such as P0418, P2440 or P2441 with P1445.

    Low riskTool: scan tool

    • IfSeveral air system codes are stored

      It meansDebris or a pump fault may be affecting the whole system.

      Go to step 2

    • IfOnly P1445 is stored

      It meansTest the valve.

      Go to step 2

  2. Have a shop run the scan tool secondary air active test with the engine running and exhaust extraction, and watch the pressure sensor for exhaust pulses.

    Best left to a shop

    Warning:The test runs with the engine running near hot exhaust parts and exhaust gases. Let a shop do it.

  3. Have a shop inspect the air lines and valves for black foam-like debris.

    Best left to a shop

    Warning:Brake, stability and wiring checks need scan tools and a lifted vehicle. Let a shop do this.

Symptoms

  • Check engine light on
  • Other secondary air codes stored

How to fix

  1. Read all stored codes and write them down before clearing anything.

  2. Look at the air pump connector and lines for obvious damage or loose parts, with the engine off and cool.

Parts and cost context

  • Secondary air pump:If the pump has failed internally, check the valves and lines for debris before fitting a new pump. Labor varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Toyota

  • 2005–2007 · Sequoia

    Supported by vehicle data

    Toyota bulletin lists this code among secondary air codes on 4.7 L 2UZ-FE engines; debris through the air pump can contaminate the system.

  • 2005–2009 · 4Runner

    Supported by vehicle data

    Toyota bulletin lists this code among secondary air codes on 4.7 L 2UZ-FE engines; debris through the air pump can contaminate the system.

  • 2006–2007 · Land Cruiser

    Supported by vehicle data

    Toyota bulletin lists this code among secondary air codes on 4.7 L 2UZ-FE engines; debris through the air pump can contaminate the system.

  • 2005–2006 · Tundra

    Supported by vehicle data

    Toyota bulletin lists this code among secondary air codes on 4.7 L 2UZ-FE engines; debris through the air pump can contaminate the system.

  • T-SB-0230-12 RevStatus unverified

    Secondary air injection codes on 2UZ-FE 4.7 L

    2005–20094runner, land-cruiser, sequoia, tundra · NHTSA 10132097

    Lists P1442 and P1445 among secondary air codes that can come from debris passing through the air injection pump assembly and contaminating components. Follow the bulletin procedure.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • P2441Secondary air switching valve stuck closed (bank 1)

    Shares causes Supported by vehicle data

    P2441 is a related stuck-closed switching valve code listed in the same Toyota bulletin.

  • P0418Secondary air pump relay A circuit fault

    Shares causes Supported by vehicle data

    P0418 (air injection relay circuit) is listed with this code in T-SB-0230-12, so a pump or relay fault can appear alongside.

All Secondary air injection codes

Sources and review

  1. Toyota T-SB-0230-12 Rev: secondary air injection codes on 2UZ-FE 4.7 L engines — Toyota Motor Sales via NHTSA
  2. Toyota Secondary Air System Diagnosis and Repair (TOYOTAtech, November 2020) — AutomotiveTechInfo.com / Toyota Motor Sales ,
  3. GX470 Trouble Codes (owner thread quoting the factory service manual) — IH8MUD forum
  4. P1445 code (2005 4Runner V8 owner thread) — IH8MUD forum
Last reviewed
Written by
Saurabh K.
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