P2444 on Subaru
Secondary Air Injection System Pump Stuck On (Bank 1)
P2444 on Subaru vehicles indicates secondary air injection system pump stuck on (bank 1). Au7o has documented this code across 2 Subaru models — most commonly on Forester, WRX. 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 Subaru range from $700 to $2,200, 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 Subaru by Model
Subaru Forester(1 issue)
- Secondary Air Injection Pump Relay Failure — Overheat / Fire Risk (Turbo XT, Recall WTM-73 / NHTSA 16V-738)2009-2013
On turbocharged Forester XT models, the relay controlling the secondary air injection (SAI) pump can fail in the closed position, leaving the air pump running continuously. Sustained operation overheats the pump, which can melt surrounding components and create a fire risk even with the vehicle parked. Subaru recalled about 100,000 turbo vehicles (Forester XT, Impreza WRX/STI, Legacy/Outback turbo) for the defect.
Subaru WRX(1 issue)
- Secondary Air Injection Pump and Switching Valve Failure Triggering CEL and Limp Mode2006-2014
Turbo EJ255/EJ257 WRX models equipped with the secondary air injection system commonly develop failures of the air pump, pressure sensor, or the air switching valves. Moisture intrusion and corrosion can cause the valves to stick or the pump to seize, which sets emissions faults and on many cars can reduce power or force a limp-home condition. Owners typically report a check-engine light shortly after cold start, often with rough cold operation or an audible pump noise before failure.
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What does P2444 mean on Subaru?▼
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 Subaru specifically, this code is documented across 2 models.
What causes P2444 on Subaru vehicles?▼
Common causes on Subaru: 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 Subaru?▼
Repair costs on Subaru range from $700 to $2,200, depending on the specific model and root cause.
Which Subaru models have P2444 documented?▼
Au7o has documented P2444 on 2 Subaru models: Forester, WRX.