What does code P0410 mean on a Subaru and is it safe to drive?
P0410: Secondary Air Injection System Malfunction. Here's what it means on your Subaru, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
PowertrainMedium urgency
What this code means
The secondary air injection system, which pumps fresh air into the exhaust on cold starts, is not working correctly.
Common causes for your Subaru
- Failed air pump
- Stuck or leaking one-way check valve
- Clogged or rusted air injection pipes
Symptoms
- Check Engine Light
- May fail emissions or show high cold-start emissions
Typical fixes
- Replace secondary air pump
- Replace check valve
- Clean or replace corroded piping
Repair cost range
For a Subaru, repairs for P0410 often fall between $250 and $900, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Subaru
Subaru P0410 on H6 models involves the secondary air injection pump and check valves. EZ30 H6 engines are less common, and the air pump is positioned differently than on the four-cylinder. Inspect the pump relay and electrical supply before removal.
Most commonly affected models
Outback H6 EZ30 2001–2009Legacy H6 EZ30 2001–2003