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P0411 — Secondary Air Injection — Incorrect Flow

Secondary air system running but not flowing expected amount.

Severity: MediumRepair: $100-$600Difficulty: Medium

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Common symptoms of P0411

Common causes of P0411

Repair cost & difficulty

Typical cost to fix P0411: $100-$600 · Difficulty: Medium

Pro tip: On BMW, check air injection check valve first — gets stuck from exhaust condensation.

Vehicles commonly affected

BMW, VW/Audi, GM, Toyota

Related trouble codes

P0410P0412

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ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.