What does code P0410 mean on a Mercedes-Benz and is it safe to drive?
P0410: Secondary Air Injection System Malfunction. Here's what it means on your Mercedes-Benz, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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 Mercedes-Benz
- 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 Mercedes-Benz, 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 Mercedes-Benz
Mercedes P0410 secondary air injection pump and combi valve are both frequent failure points on M271 and M272 petrol engines. Replace the combi valve first—it's inexpensive and often resolves P0410 without needing to replace the pump. Use XENTRY to command the SAI pump and verify operation.
Most commonly affected models