P2445 on Toyota
Secondary Air Injection System Pump Stuck Off Bank 1
P2445 on Toyota vehicles indicates secondary air injection system pump stuck off bank 1. Au7o has documented this code across 3 Toyota models — most commonly on 4Runner, Sequoia, Tacoma. This generic emissions code means the secondary air injection (AIR) pump on bank 1 is not moving air when commanded to during cold-start operation. The secondary air system briefly pumps fresh air into the exhaust at startup to help burn off the rich cold-start mixture and reduce emissions, and the PCM detects no airflow or pump activity. It is primarily an emissions/inspection concern and rarely affects how the car drives, though it should be repaired to pass smog testing. Typical repair costs on Toyota range from $300 to $3,000, depending on the specific model and root cause.
Common Causes of P2445
- •Failed or seized secondary air injection pump
- •Moisture/corrosion seizing the pump (failed check valve)
- •Faulty air pump relay or blown fuse
- •Damaged wiring or connector to the pump
- •Clogged or disconnected air hose
- •Stuck secondary air control/check valve
- •Faulty PCM driver circuit (rare)
P2445 on Toyota by Model
Toyota 4Runner(1 issue)
- Secondary Air Injection Pump/Valve Failure Triggering Limp Mode on 4.7L V82005-2009
The 4.7L 2UZ-FE V8 used in later 4th-generation 4Runners is known for secondary air injection system failures involving the air pump and switching valves. When the system sticks or fails electrically, the truck may illuminate the check engine light and enter reduced-power or limp mode. This problem is widely documented across Toyota V8 trucks and SUVs of the era and can be very expensive when repaired with OEM components.
Toyota Sequoia(1 issue)
- Secondary Air Injection Pump Failure (3UR-FE/i-FORCE)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.
Toyota Tacoma(1 issue)
- Secondary Air Injection Pump and Switching Valve Failure on 4.0L V62005-2011
Tacomas with the 1GR-FE 4.0L V6 are known for failures of the secondary air injection system, including the air pump and switching valves. Moisture intrusion and valve sticking can trigger check-engine lights and force the truck into reduced-power or limp mode. Owners frequently report sudden loss of acceleration along with expensive dealer repair estimates because the intake manifold often must be removed to access components.
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What does P2445 mean on Toyota?▼
P2445 stands for "Secondary Air Injection System Pump Stuck Off Bank 1." This generic emissions code means the secondary air injection (AIR) pump on bank 1 is not moving air when commanded to during cold-start operation. The secondary air system briefly pumps fresh air into the exhaust at startup to help burn off the rich cold-start mixture and reduce emissions, and the PCM detects no airflow or pump activity. It is primarily an emissions/inspection concern and rarely affects how the car drives, though it should be repaired to pass smog testing. On Toyota specifically, this code is documented across 3 models.
What causes P2445 on Toyota vehicles?▼
Common causes on Toyota: Failed or seized secondary air injection pump, Moisture/corrosion seizing the pump (failed check valve), Faulty air pump relay or blown fuse, Damaged wiring or connector to the pump, Clogged or disconnected air hose. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2445 on a Toyota?▼
Repair costs on Toyota range from $300 to $3,000, depending on the specific model and root cause.
Which Toyota models have P2445 documented?▼
Au7o has documented P2445 on 3 Toyota models: 4Runner, Sequoia, Tacoma.