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P0411 Diagnostic Trouble Code Discussion for November 2013

Secondary AIR System Incorrect Airflow Detected

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Trouble Ticket Help Requests for DTC P0411
Help Request Posted
2005 Buick LaCrosse CX 3.8L MIL Lamp on, Reduce engine power VIN: 2G4WC53295
P0411: Secondary AIR System Performance. Scan checked for codes, got a P1516, clear the code and power comes back until it happens again. Problem happens right after cranking, engine always starts but has no power and P1516 code stores, but it is an intermmitent problem sometimes not occurring for da...
November 01, 2013