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  1. #1
    CEC
    Exhausted

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    Offline
    Join Date
    Dec 2010
    Location
    Clitheroe, Lancashire
    Posts
    8

    3.0 v6 fault code P0491 & P0492 help

    Hi guys,
    Can anyone help with fault code P0491 and P0492 as in how to fix ?

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Woorlord's Avatar
    shifting to Hyperspace... .

    Status
    Offline
    Join Date
    Dec 2007
    Location
    Tiptree, Essex
    Posts
    946
    P0491 16875 Secondary Air Injection System Insufficient Flow Bank 1
    P0492 16876 Secondary Air Injection System Insufficient Flow Bank 2

    Would indicate possible problems with Secondary Air Injection (AIR) pump relay -J299-
    and/or
    Secondary Air Injection (AIR) solenoid valve -N112-
    and/or
    Secondary Air system seal

    PM me your email address and can send you a pdf on testing these aspects.
    2001 A4 Saloon 3.0 Quattro Sport Tiptronic - Platinum Leather/Heated Front Seats/BOSE/DIS/Cruise Control
    Retrofits:GmBH Bumpers, F&R Ambient LEDS, OEM Valeo Xenons (D2S) & Headlight Washers, Auto-dipping RVM, Footwell Lights, Vent Control illumination, ISO-Fix, RNS-E & OEM Bluetooth + VIMhack + Video i-pod & Aux inputs, Rear PDC, Powerflow 100mm Tips, Reversing Camera
    2012 A4 Saloon 2.0 TDIe Technik (163ps)
    Diagnostics:VCDS HEX+USB+CAN Cable

  4. #3
    Reverse Gear

    Status
    Offline
    Join Date
    Oct 2013
    Posts
    2
    I have the same problem on my audi q5 3.2 year 2010. i have changed all valves, pump and tubes. after changing i still get the same faultcode. what could it be?

 

 

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