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  1. 05-14-2008 11:12 PM #1
    PoWeRof4
    PoWeRof4 is offline
    Active Member Two Rings
    Join Date
    Nov 15 2007
    AZ Member #
    22611
    My Garage
    2001 Audi A4 1.8tM Quattro
    Location
    San Diego

    Engine code P0400?

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    What do I do to fix this? My check engine light is P0400 (Exhaust Gas Recirculation (EGR) - Flow Malfunction B). What do I need to fix now???
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  2. 05-14-2008 11:24 PM #2
    PoWeRof4
    PoWeRof4 is offline
    Active Member Two Rings
    Join Date
    Nov 15 2007
    AZ Member #
    22611
    My Garage
    2001 Audi A4 1.8tM Quattro
    Location
    San Diego

    Re: Engine code P0400?

    ????
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  3. 09-17-2008 08:22 AM #3
    flashburn
    flashburn is offline
    Senior Member Three Rings
    Join Date
    Feb 21 2008
    AZ Member #
    25513
    My Garage
    NASA Racecar // Turbo Miata // Twin Turbo BMW // Superduty
    Location
    Akron

    Re: Engine code P0400?

    Your EGR valve likely needs cleaned or replaced.
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  4. 09-17-2008 08:31 AM #4
    mike-2ptzero
    mike-2ptzero is offline
    Account Terminated Four Rings mike-2ptzero's Avatar
    Join Date
    Jul 07 2004
    AZ Member #
    2716
    My Garage
    630AWHP A4, Nissan Titan
    Location
    socal

    Re: Engine code P0400?

    Check the vac line.
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