2021 Mercedes-Benz P0410: What It Means & Is It Safe to Drive?
P0410 on the 2021 Mercedes-Benz: Secondary Air Injection System Malfunction. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe 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 on the 2021 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 2021 Mercedes-Benz, repairs for P0410 typically fall between $250 and $900, depending on the root cause and labor rates in your area.
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