P2445 on 2008-2013 Toyota Sequoia: Air Injection Pump Stuck Off Fixes

What's Unique About the 2008-2013 Toyota SEQUOIA

This is an extremely common and well-documented problem on the V8 engines used in the 2008-2013 Sequoia and its sibling, the Tundra. The design of the system allows moisture from the exhaust to get past the air switching valves, which are located under the intake manifold. This moisture then travels down the hoses to the air pumps located in the passenger-side fender well, causing corrosion and seizure of the pump motors. Another failure point is the foam pre-filter inside the pumps disintegrating, sending debris into the valves and causing them to stick open. The failure is so common that Toyota issued Technical Service Bulletins (TSBs) and a Warranty Enhancement Program (ZHA), though most vehicles in this year range are now outside the coverage period.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light is on
• Vehicle enters 'limp mode' with severely reduced engine power.
• Flashing 'VSC OFF' and '4LO' lights on the dashboard.
• Loud whining or vacuum cleaner-like noise from the passenger side fender area on a cold start, which may stop completely as the pump fails.
• Failure to pass an emissions test.

Most Likely Causes

1. Failed Secondary Air Injection Pump 🔴 High Probability → Shop Secondary Air Injection Pump The pumps are vulnerable to moisture ingestion from faulty air switching valves, leading to internal corrosion and motor failure. During winter months, this moisture can freeze, causing the pump to seize. Additionally, the internal foam filters can degrade, sending debris into the system or clogging the pump itself.
   How to confirm: Command the pump on with a bi-directional scan tool. If it doesn't run, check for power and ground at the pump connector. The pumps are located behind the passenger-side front fender liner. If power is present but the pump is silent or makes a grinding noise, it has failed. A seized pump will often blow the 50A 'AIR PMP' fuse.
   Typical fix: Replace the failed air pump. It is highly recommended to inspect or replace the air switching valves at the same time to prevent repeat failure. Many owners also perform a 'filter mod' to prevent future water intrusion.
   Est. part cost: $450-$700 for one OEM pump.
2. Stuck/Failed Air Switching Valves 🔴 High Probability As stated in TSB T-SB-0230-12 Rev, debris and moisture can cause the valves, located under the intake manifold, to stick open or closed. A stuck-open valve allows hot exhaust gas and moisture back into the air pumps, destroying them. Disintegrated foam from the pumps is also a common cause of the valves sticking.
   How to confirm: This is difficult to confirm without removing the intake manifold for visual inspection. Codes like P2440, P2441, P2442, or P2443 often accompany the pump codes and point directly to valve failure.
   Typical fix: Replace both air switching valves. This is a labor-intensive job that requires removing the intake manifold.
   Est. part cost: $150-$300 per valve.
3. Blown Fuse or Faulty Relay/Driver 🟡 Medium Probability
   How to confirm: Check the 50A 'AIR PMP' fusible link and the air injection control drivers (small modules located near the main fuse box). A seized pump will often blow the main fuse. If the fuse is blown, the pump motor is almost certainly the root cause.
   Typical fix: Replace the blown fuse or faulty relay/driver. If the fuse blows again immediately, the air pump is seized and needs to be replaced.
   Est. part cost: $5-$50 for a fuse, $70-$150 for a control driver.
4. Outdated ECM Software ⚪ Low Probability TSB T-SB-0024-13 notes that for some 2012-2013 models, the ECM logic was too sensitive and could set P2445, particularly in freezing temperatures. A similar ECM glitch is known on some 2005-2006 4.7L models where the code appears when nearing 50 mph after a cold start in freezing weather.
   How to confirm: A Toyota dealership can check the current calibration ID of your ECM and compare it to the updated versions listed in the TSB. This issue often manifests as the code appearing only when driving above a certain speed after a cold start in near-freezing weather.
   Typical fix: Update or 'reflash' the ECM to the latest software version. This must be done by a dealer or a qualified shop with Toyota's Techstream software. Note that some limited service campaigns for this reflash may have expired.
   Est. part cost: $0 if covered by a campaign, otherwise $100-$250 for labor.

Rare But Worth Checking

• Damaged Wiring or Connectors: The wiring to the pumps is located in the fender well and can be susceptible to corrosion or physical damage. Always inspect the harness before replacing expensive components.

Diagnosis Steps

1. Read all fault codes with an OBD-II scanner. Note any other codes present with P2445, especially P0418 or any valve codes (P2440-P2443).
2. Check the 50A 'AIR PMP' fusible link and the two Air Injection Control Drivers in the engine compartment fuse box area.
3. If possible, use a bi-directional scanner to command the Bank 1 air pump to turn on during a cold start. Listen for its operation (it should sound like a vacuum cleaner).
4. If the pump does not run, gain access to the pump assembly behind the passenger side front fender liner by removing the wheel and liner.
5. Check for voltage at the air pump connector when it is commanded on. If voltage is present but the pump doesn't run, the pump has failed.
6. Remove the pump inlet cover and inspect the foam filter. If it is wet, crumbly, or missing, it has failed and likely sent debris to the switching valves, necessitating their replacement.
7. If the pump runs but the code persists, or if you also have valve-related codes (P2440-P2443), the air switching valves under the intake manifold are the primary suspect.
8. Inspect the air hoses for cracks, blockages, or signs of moisture/soot, which indicates a leaking switching valve.
9. For a definitive valve diagnosis, the intake manifold must be removed for inspection and replacement of the valves.

Parts You'll Likely Need

• Secondary Air Injection Pump (OEM #17610-0S030) — This is the component that fails, triggering the code. Failure is typically caused by moisture from faulty valves or a disintegrated internal filter.
  Trusted brands: Toyota (OEM), Aisin, Dorman
  OEM price range: $475-$700
  Aftermarket price range: $150-$350
• Air Injection Switching Valve Assembly (OEM #25701-38064) — This valve assembly is often the root cause of the problem, getting stuck and allowing moisture to ruin the pump. It's recommended to replace it with the pump. This part number supersedes older versions like 25701-38060, -38061, -38062, and -38063.
  Trusted brands: Toyota (OEM), Dorman
  OEM price range: $200-$350
  Aftermarket price range: $100-$180
• SAIS Bypass Kit — A popular, cost-effective alternative to a full system repair for out-of-warranty vehicles. It disables the system and prevents CEL/limp mode.
  Trusted brands: Hewitt Technologies
  Aftermarket price range: $400-$600
• Intake Manifold Gaskets — These must be replaced anytime the intake manifold is removed to access the air switching valves.
  Trusted brands: Toyota (OEM), Fel-Pro, Mahle
  OEM price range: $40-$60
  Aftermarket price range: $20-$40

Related Codes That Often Appear With This One

• P0418 — This code means 'Secondary Air Injection System Relay 'A' Circuit' and is often set alongside P2445 when the pump motor fails or seizes, causing an electrical fault.
• P2440 — 'Secondary Air Injection System Switching Valve Stuck Open Bank 1'. This code indicates the root cause of the pump failure: the valve that allowed moisture to destroy the pump is faulty.
• P2441 — 'Secondary Air Injection System Switching Valve Stuck Closed Bank 1'. This code points to a failure in the valve assembly.
• P2442 — 'Secondary Air Injection System Switching Valve Stuck Open Bank 2'. It is very common for both bank 1 and bank 2 valves to fail around the same time.
• P2447 — 'Secondary Air Injection System Pump Stuck Off Bank 2'. This code is for the other pump (Bank 2). It's common for both pumps to be replaced at the same time.

Technical Service Bulletins (TSBs) & Recalls

• T-SB-0024-13: Addresses MIL ON with DTC P0418 and/or P2445 on 2012-2013 Sequoia/Tundra, recommending an ECM logic update.
• T-SB-0230-12 Rev: Details the diagnosis and repair for a range of SAIS codes including P2445, noting the cause can be debris contaminating system components.
• Customer Support Program ZHA: A Warranty Enhancement from Toyota extending coverage for the SAIS failure to 10 years/150,000 miles.

Platform-Specific Known Issues

• Toyota issued TSB T-SB-0024-13 for 2012-2013 models, indicating that the ECM logic could be overly sensitive and trigger P2445 in freezing temperatures. A reflash is the specified fix.

Hidden / Shadow Codes Worth Checking

• Mode 6, TID $81, CID $01: Mode 6 data can provide more granular test results from the ECM's self-diagnostics. For the secondary air system, technicians can look at the Test ID (TID) for the pressure sensor reading during the pump-on test. A value outside the expected minimum and maximum thresholds indicates a failure even before a DTC is set. The specific TIDs can vary by model year and calibration. (see via A professional scan tool capable of displaying OBD-II Mode 6 data.)

Scan Tool Commands That Help

• Toyota Techstream: Active Test: 'Control the Air Injection Pump / Air Switching Valve' — This command allows a technician to manually turn the air pump and switching valves on and off from the scan tool. This is the primary method for confirming if the pump motor runs, if the valves click, and if air is flowing without having to wait for a cold start. It's essential for verifying component function before and after replacement.
• Toyota Techstream: Check Mode — Placing the ECM into 'Check Mode' increases its sensitivity to malfunctions, using a 1-trip detection logic instead of the usual 2-trip logic. This can help confirm an intermittent fault more quickly during a test drive.

Wiring & Ground Locations

• Air Pump Bank 1 Connector — Behind the passenger side front fender liner, connected to the forward-most air pump.. The wire colors on the vehicle harness side identify which pump is Bank 1. For the 5.7L V8, the Bank 1 pump connector has a Black and a Blue wire. This is critical for correctly diagnosing the right pump, as both pumps are identical.
• Air Pump Bank 2 Connector — Behind the passenger side front fender liner, connected to the rear-most air pump.. The wire colors for the Bank 2 pump connector are White and Black. This helps differentiate it from the Bank 1 pump.
• Ground Point ED (2008-2013) — On the left (driver's side) front inner fender panel.. Wiring diagrams for earlier models show this as a potential ground point for the Air Injection Control Driver. A corroded or loose ground here could cause intermittent electrical issues for the system.
• Ground Point A1 / A2 (2014+ style, may apply to late 2013) — Behind the left (driver's side) headlight assembly.. Later model wiring diagrams show primary body grounds in this location. Verifying clean, tight grounds is a key step in diagnosing any electrical fault code like P2445.

Real Owner Repair Stories

• Tacoma World Forum Member (Toyota Tacoma (similar SAIS system design)) — Check engine light, vehicle in 'limp mode' (unable to exceed 2500 RPM).
  ❌ Tried (didn't work) Checked all related fuses., Disconnected pump to verify a circuit code would appear (it did, confirming wiring was likely okay).
  ✅ What actually fixed it The owner removed the air pump and found the bottom of the housing contained water and the motor was rusted. Replacing the Secondary Air Injection pump with a new OEM unit resolved the code and the truck ran without issue for over 2 years after the repair.
• Toyota Tundra Forum Member (2005 Toyota Tundra 4.7L) — Limp mode with codes P2445 and P0418.
  ❌ Tried (didn't work) Replaced the air pump and check valve. The truck ran well for about 100 miles, then returned to limp mode., Replaced the air driver module and air pump fuse. The truck again ran fine for about 100 miles, then P2445 returned.
  ✅ What actually fixed it The issue was determined to be the known 'cold weather glitch' where the ECM software falsely triggers the code in near-freezing temperatures. The owner was advised that the only permanent fix is an ECM re-flash from Toyota (if available) or installing a bypass kit. The repeated parts replacement did not solve the underlying software issue.

OEM Part Supersession History

• 25701-38060, 25701-38061, 25701-38062, 25701-38063, 25701-38120, 25701-38121 → 25701-38064 — Revisions to improve durability and prevent the valves from sticking, which is the root cause of most pump failures.
  Heads up: The newest part number (25701-38064) is the correct and recommended replacement for all previous versions and should be used for all repairs to ensure the most durable fix.

Model Year Variations Within This Range

• 2012-2013: These model years may have overly sensitive ECM logic that can falsely trigger P2445 in freezing temperatures. Toyota issued TSB T-SB-0024-13 to address this with a software update (reflash). This is less likely to be a hard part failure compared to earlier years if the symptoms match the TSB conditions.