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P0411 Diagnostic Trouble Code Discussion for August 2011

Secondary AIR System Incorrect Airflow Detected


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Trouble Ticket Help Requests for DTC P0411
Help Request Posted
1999 Audi A4 Quattro 2.8L Excessive Emissions, MIL Lamp on VIN: WAUED28D7X
P0411: Secondary aire injection incorrect flow. Vehicle came in with P0411 secondary air flow incorrect. Had some failing vacuum lines so those and the vacuum solenoid were replaced. 6 weeks later the code came back and the combi valves were replaced. The air pump can be turned on manually and it appears to...
August 05, 2011
1999 Audi A4 Quattro 2.8L Excessive Emissions, MIL Lamp on VIN: WAUED28D7X
P0411: Secondary aire injection incorrect flow. Vehicle came in with P0411 secondary air flow incorrect. Had some failing vacuum lines so those and the vacuum solenoid were replaced. 6 weeks later the code came back and the combi valves were replaced. The air pump can be turned on manually and it appears to...
August 05, 2011