P0411Średni
Wtórny układ powietrza — nieprawidłowy przepływ (VAG)
Układ napędowy
Sprawdź szczegóły →P1423
ŚredniSecondary Air System Bank 1 — Flow Too Low (BMW)
OBD-II (EN): Secondary Air Injection System Bank 1 - Flow Too Low
Code P1423 — Secondary Air System Bank 1 — Flow Too Low (BMW). Symptoms: check engine light after cold start. Possible cause: faulty secondary air pump. Professional diagnosis recommended.
Symptoms
Check engine light after cold start, increased HC emissions
Possible causes
Faulty secondary air pump, stuck valve, clogged hose, corrosion
Affected systems
Silnik spalinowyUkład wydechowy
Related codes
Code P1423 appears in these brands
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Tags and synonyms
Does code P1423 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.