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3.0 v6 fault code P0491 & P0492 help

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by CEC, May 17, 2011.

  1. CEC
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    CEC Exhausted

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    [May 17, 2011]
    Hi guys,
    Can anyone help with fault code P0491 and P0492 as in how to fix ?
    #1
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  3. Woorlord
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    Woorlord shifting to Hyperspace... . VCDS Map User

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    [May 17, 2011]
    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.
    #2
  4. Abiro
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    Abiro New Member

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    [Oct 18, 2013]
    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?
    #3

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