What P0411 means
Secondary Air Injection System Incorrect Flow Detected
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P0411:
| BMW | Secondary Air Injection System Incorrect Flow Detected |
| FORD | SAI System Incorrect Upstream Flow Detected |
| HONDA | Secondary Air Injection System Incorrect Flow |
| MITSUBISHI | Secondary Air Injection System Incorrect Flow Detected |
| NISSAN | Secondary Air Injection System Incorrect Flow Detected |
| VOLKSWAGEN | Secondary Air Injection (AIR) System |
Read this code on your own car
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