P0410 on Subaru
Secondary Air Injection System Malfunction
P0410 on Subaru vehicles indicates secondary air injection system malfunction. Au7o has documented this code across 2 Subaru models — most commonly on WRX, WRX STI. P0410 indicates the engine computer detected a malfunction in the secondary air injection system, which pumps fresh air into the exhaust during cold starts to help the catalytic converter heat up and burn off pollutants faster. The system uses an air pump, valves, and hoses, and the computer monitors whether the expected airflow and resulting oxygen-sensor response actually occur. When the system doesn't perform as commanded — too little or no airflow detected — it sets this code. It generally points to a failed pump or stuck valve and primarily affects emissions, especially during the first minutes after a cold start. Typical repair costs on Subaru range from $600 to $2,200, depending on the specific model and root cause.
Common Causes of P0410
- •Failed secondary air injection pump (seized or worn motor)
- •Stuck or faulty air injection / check valve
- •Vacuum or electrical control problem to the air switching valve
- •Cracked, disconnected, or clogged air injection hoses
- •Moisture or corrosion damage inside the air pump
- •Blown fuse or relay for the air pump
- •Faulty wiring or connector in the air injection circuit
P0410 on Subaru by Model
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.
Subaru WRX STI(1 issue)
- Air Injection System (Secondary Air Pump/Valves) Failure (P0410/P244x)2008-2014
Subaru WRX STI models equipped with the EJ257 and secondary air injection commonly develop failures of the air pump and/or the air switching valves, often due to moisture intrusion and internal corrosion that causes the valves to stick. Owners typically see a check engine light with cold-start drivability changes and may fail emissions/inspection due to stored air injection codes. This issue is widely documented in owner reports and Subaru service information/TSBs covering secondary air injection diagnostics and component replacement.
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What does P0410 mean on Subaru?▼
P0410 stands for "Secondary Air Injection System Malfunction." P0410 indicates the engine computer detected a malfunction in the secondary air injection system, which pumps fresh air into the exhaust during cold starts to help the catalytic converter heat up and burn off pollutants faster. The system uses an air pump, valves, and hoses, and the computer monitors whether the expected airflow and resulting oxygen-sensor response actually occur. When the system doesn't perform as commanded — too little or no airflow detected — it sets this code. It generally points to a failed pump or stuck valve and primarily affects emissions, especially during the first minutes after a cold start. On Subaru specifically, this code is documented across 2 models.
What causes P0410 on Subaru vehicles?▼
Common causes on Subaru: Failed secondary air injection pump (seized or worn motor), Stuck or faulty air injection / check valve, Vacuum or electrical control problem to the air switching valve, Cracked, disconnected, or clogged air injection hoses, Moisture or corrosion damage inside the air pump. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0410 on a Subaru?▼
Repair costs on Subaru range from $600 to $2,200, depending on the specific model and root cause.
Which Subaru models have P0410 documented?▼
Au7o has documented P0410 on 2 Subaru models: WRX, WRX STI.