P2444 on Toyota
Secondary Air Injection System Pump Stuck On (Bank 1)
P2444 on Toyota vehicles indicates secondary air injection system pump stuck on (bank 1). Au7o has documented this code across 2 Toyota models — most commonly on 4Runner, Sequoia. This powertrain/emissions code means the secondary air injection (AIR) pump for bank 1 appears to be stuck in the 'on' position, continuing to push air when it should be off. The secondary air system briefly pumps fresh air into the exhaust after a cold start to help the catalytic converter heat up and reduce emissions. The computer detected airflow or pressure when none was expected. This is mainly an emissions concern but, if ignored, can affect the air-fuel mixture and over time stress emissions components. Typical repair costs on Toyota range from $300 to $3,000, depending on the specific model and root cause.
Common Causes of P2444
- •Faulty secondary air injection pump (running continuously)
- •Stuck-open air switching/check valve
- •Wiring or relay fault keeping the pump powered
- •Faulty pump control relay
- •Connector corrosion or short in the AIR circuit
- •Faulty engine control module (rare)
P2444 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.
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View P2444 across all makes →Frequently Asked Questions
What does P2444 mean on Toyota?▼
P2444 stands for "Secondary Air Injection System Pump Stuck On (Bank 1)." This powertrain/emissions code means the secondary air injection (AIR) pump for bank 1 appears to be stuck in the 'on' position, continuing to push air when it should be off. The secondary air system briefly pumps fresh air into the exhaust after a cold start to help the catalytic converter heat up and reduce emissions. The computer detected airflow or pressure when none was expected. This is mainly an emissions concern but, if ignored, can affect the air-fuel mixture and over time stress emissions components. On Toyota specifically, this code is documented across 2 models.
What causes P2444 on Toyota vehicles?▼
Common causes on Toyota: Faulty secondary air injection pump (running continuously), Stuck-open air switching/check valve, Wiring or relay fault keeping the pump powered, Faulty pump control relay, Connector corrosion or short in the AIR circuit. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2444 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 P2444 documented?▼
Au7o has documented P2444 on 2 Toyota models: 4Runner, Sequoia.