P2441 on Toyota
Secondary Air Injection System Switching Valve Stuck Closed (Bank 1)
P2441 on Toyota vehicles indicates secondary air injection system switching valve stuck closed (bank 1). Au7o has documented this code across 4 Toyota models — most commonly on 4Runner, Land Cruiser, Sequoia. 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. Typical repair costs on Toyota range from $300 to $3,000, depending on the specific model and root cause.
Common Causes of P2441
- •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
P2441 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 Land Cruiser(2 issues)
- Secondary Air Injection Pump Failure (200 Series)2008-2021
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.
- Secondary Air Injection System Failure (100-Series, 4.7L V8)1998-2007
The secondary air injection (AI) system on the 100-series Land Cruiser (1998-2007) with the 2UZ-FE 4.7L V8 is a notorious failure point, identical to the issue on the Sequoia and Tundra of the same era. The electric AI pump, air switching valves (ASV), and exhaust manifold check valves all fail. The aluminum check valves in the exhaust manifolds corrode and seize, the ASV sticks from carbon buildup, and the pump motor eventually burns out. This system is responsible for the most common check engine light on 100-series Land Cruisers.
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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View P2441 across all makes →Frequently Asked Questions
What does P2441 mean on Toyota?▼
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. On Toyota specifically, this code is documented across 4 models.
What causes P2441 on Toyota vehicles?▼
Common causes on Toyota: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2441 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 P2441 documented?▼
Au7o has documented P2441 on 4 Toyota models: 4Runner, Land Cruiser, Sequoia, Tacoma.