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Fault code 16785

Discussion in 'A3/S3/Sportback (8P Chassis)' started by rickyquicky, Feb 6, 2011.

  1. rickyquicky

    rickyquicky Member

    Dec 30, 2008
    Likes Received:
    Had my car on the diagnostics machine yesterday as I had engine management light on.

    Came up with fault 16785 'insufficient egr exhuast flow'.

    I had a new EGR a few months ago so surely it cant be that again? Anyone have any experience of this fault or can give me a few pointers?

    The code was cleared and hasnt come back...yet!

    I've heard it may be related to MAF sensor?
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  3. paddy

    paddy Audi=No fault code, no idea

    Feb 6, 2008
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    This is what Rosstech say...You could check the wireing conectors ??
    16785/P0401/001025 - Exhaust Gas Recirculation (EGR) System: Insufficient Flow Detected

    Possible Symptoms

    • Malfunction Indicator Light (MIL) ON
    • Reduced Exhaust Gas Recirculation (EGR)
    • Reduced Power Output/Engine running rough
    • Increased Emissions
    Possible Causes

    • Exhaust Gas Recirculation (EGR) Flow restricted/clogged
    • Exhaust Gas Recirculation (EGR) Valve stuck closed/leaking/faulty
    • Wiring and/or Connector(s) from/to Exhaust Gas Recirculation (EGR) Valve faulty
    • Exhaust Gas Recirculation (EGR) System faulty
    Possible Solutions

    • Check/Clean Exhaust Gas Recirculation (EGR) System
    • Check/Replace Exhaust Gas Recirculation (EGR) Valve
    • Check Wiring and/or Connector(s) from/to Exhaust Gas Recirculation (EGR) Valve

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