P0411 — Secondary air injection system — incorrect flow detected

Code P0411 is a standard OBD-II diagnostic trouble code: Secondary air injection system — incorrect flow detected.

In our record, P0411 is reported most often on Chevrolet, Buick and Cadillac vehicles , against engine and electrical failure patterns , across 2006–2010 model years.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0411 across 5 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report P0411 5 patterns

2010 Chevrolet Impala

electrical — Engine power loss and reduced-engine-power message during driving

2008 Buick LaCrosse

electrical — Ignition Coil Melting and Ignition Control Module Failure

2008 Cadillac DTS

engine — Oil leaks from pan, seals, and gaskets

2008 Pontiac Grand Prix

engine — Secondary air injection system failure

2006 Subaru Impreza

engine — Secondary Air Injection (SAI) system valve failure

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →