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P0411 Diagnostic Trouble Code Discussion for June 2025

Secondary AIR System Incorrect Airflow Detected


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Trouble Ticket Help Requests for DTC P0411
Help Request Posted
2004 Ford Focus ZX3 2.3L Cuts out, Stall VIN: 3FAHP31Z54
P0411: Secondary Air Upstream Error. This car will drive fine when light on the throttle, but as soon as you push harder than about 1/3 on the pedal, it jerks back and forth, revs and then cuts out but does not die. It continues to rev and jerk until you let off the pedal and use less than 1/...
June 11, 2025
2003 BMW 330i 3.0L MIL Lamp on VIN: WBAEV53433
P0411: Secondary Air System incorrect flow. Hi BMW Techs, I have a P0411 on this 2003 BMW 330i that just won't quit. See above for everything I've done but will repeat here: 1)Swapped in all components of SAS secondary air system ( air pump, check valve, maf for SAS, all hoses) from identical g...
June 14, 2025