P2447 on Toyota
Secondary Air Injection System Pump Stuck Off (Bank 2)
P2447 on Toyota vehicles indicates secondary air injection system pump stuck off (bank 2). Au7o has documented this code across 1 Toyota model — most commonly on Tacoma. This code means the engine computer detected that the secondary air injection (SAI) pump for Bank 2 appears stuck off - it is not delivering the expected airflow when commanded on. The SAI system injects fresh air into the exhaust during cold starts to reduce emissions until the catalytic converter warms up. If the pump isn't producing flow, cold-start emissions rise and the system fails its self-test. This is primarily an emissions issue rather than a driving hazard, but it will keep the check engine light on and can cause inspection failures. Typical repair costs on Toyota range from $1,200 to $3,000, depending on the specific model and root cause.
Common Causes of P2447
- •Failed or seized secondary air injection pump
- •Blown fuse or faulty relay for the air pump
- •Wiring or connector fault to the pump
- •Stuck-closed air switching/check valve
- •Clogged or disconnected air injection hose
- •Water or debris damage to the pump
P2447 on Toyota by Model
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 P2447 across all makes →Frequently Asked Questions
What does P2447 mean on Toyota?▼
P2447 stands for "Secondary Air Injection System Pump Stuck Off (Bank 2)." This code means the engine computer detected that the secondary air injection (SAI) pump for Bank 2 appears stuck off - it is not delivering the expected airflow when commanded on. The SAI system injects fresh air into the exhaust during cold starts to reduce emissions until the catalytic converter warms up. If the pump isn't producing flow, cold-start emissions rise and the system fails its self-test. This is primarily an emissions issue rather than a driving hazard, but it will keep the check engine light on and can cause inspection failures. On Toyota specifically, this code is documented across 1 model.
What causes P2447 on Toyota vehicles?▼
Common causes on Toyota: Failed or seized secondary air injection pump, Blown fuse or faulty relay for the air pump, Wiring or connector fault to the pump, Stuck-closed air switching/check valve, Clogged or disconnected air injection hose. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2447 on a Toyota?▼
Repair costs on Toyota range from $1,200 to $3,000, depending on the specific model and root cause.
Which Toyota models have P2447 documented?▼
Au7o has documented P2447 on 1 Toyota model: Tacoma.