smartcarofamerica.com/threads/451-smart-p0410-code.164097

1 excerpts.

Forum thread: 451 smart P0410 code

smartcarofamerica.com/threads/451-smart-p0410-code.164097 · p. 1 · Applies to: 451

Source: smartcarofamerica.com Topic: P0410 secondary air injection system Models discussed: 451 Solution status: no

Problem: P0410 engine code persists after replacing O2 sensor, secondary air injection pump, and auxiliary air valve on a 451 Smart car.

Solution: unresolved. Multiple components were suggested and replaced (auxiliary air valve by Mike1nw, secondary air injection pump by OP), but the code returned after reset. Jetfuel suggested checking the 50amp fuse in battery compartment, inspecting vacuum lines/air supply from pump to head for ruptures or leaks, and verifying the pump runs (temperature-dependent). OP confirmed checking for leaks but no final resolution reported.

Key facts: - OP replaced O2 sensor, secondary air injection pump, and auxiliary air valve without resolving P0410 code - Mike1nw reported auxiliary air valve replacement fixed P0410 in their case, but OP had already replaced this part - Jetfuel identified potential causes: 50amp fuse failure, vacuum line rupture, air supply leaks from pump to head, or non-functioning pump - Pump operation is temperature-dependent and should be audible - Thread remains unresolved as of final post