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  1. #1
    Senior Member Three Rings Stockton's Avatar
    Join Date
    Mar 04 2008
    AZ Member #
    26026
    My Garage
    2004 A4 Quattro 1.8t 6spd
    Location
    Palm Beach Co, FL

    Can someone tell me what these codes mean?

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    It's from an '04 A6 2.7t Auto.

    P-0491 & P-0492

    Thanks much.

  2. #2
    Senior Member Three Rings Stockton's Avatar
    Join Date
    Mar 04 2008
    AZ Member #
    26026
    My Garage
    2004 A4 Quattro 1.8t 6spd
    Location
    Palm Beach Co, FL

    Re: Can someone tell me what these codes mean?

    Sorry posted in the wrong forum ment to got in the A6 section.

  3. #3
    Veteran Member Four Rings onceover's Avatar
    Join Date
    Jun 08 2008
    AZ Member #
    29690
    My Garage
    B8 A4, 964 Carrera, 955 Cayenne S, MK1 Cabrio, T2b Westfalia
    Location
    Calgary AB Canada

    Re: Can someone tell me what these codes mean?


  4. #4
    Veteran Member Four Rings diagnosticator's Avatar
    Join Date
    Aug 26 2005
    AZ Member #
    7741
    Location
    Seattle, WA

    Re: Can someone tell me what these codes mean?

    Quote Originally Posted by Stockton View Post
    It's from an '04 A6 2.7t Auto.

    P-0491 & P-0492

    Thanks much.
    Secondary Air Injection System Insufficient Flow, P-0491 Bank 1, P-0492 Bank 2.

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