P0410 — Secondary Air Injection System Malfunction
CAUTIONIs it safe to drive? Drive gently and get it looked at soon — it can worsen or fail inspection.
What P0410 means
This is a manufacturer-specific code — its meaning depends on the vehicle’s make (see below).
What P0410 means on specific makes
Mercedes-Benz CAUTION
Generic code but extremely common on Mercedes (M112/M113/M272 etc.). The secondary air (smog) pump or its check valves/lines fail, usually moisture-killed pump or stuck valves — a cold-start emissions function.
- Failed secondary air injection pump (moisture damage) ($200-500)
- Stuck/leaking air check (shutoff) valves ($100-300)
- Switchover/vacuum control valve
- Clogged air passages
Check first: Test the SA pump runs at cold start and that the check valves hold. Note MB techs see this as a near-wear-item on older V6/V8s.
Source: BenzWorld P0410 fixed threads; MB Medic fault codes