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P0491 Diagnostic Trouble Code Discussion for July 2007

Secondary AIR System Insufficient Flow Detected (Bank 1)

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Trouble Ticket Help Requests for DTC P0491
Help Request Posted
2001 Audi A6 Quattro 4.2L MIL Lamp on VIN: WAUZL64B81
P0491: Sec. Air Inj. Sys. Bank 1 Incorrect Flow Detected. Hello; I am having a challange with these codes. I have check for leaks, none found. I have replaced the secondary air pump, codes come right back. The car seems to run fine. Any ideas?
July 30, 2007