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  1. #1
    Senior Member Three Rings Azoriano's Avatar
    Join Date
    Jun 28 2013
    AZ Member #
    118021
    My Garage
    2009 S5 V8 4.2l
    Location
    Toronto
    Items for Sale

    Advice needed on P2188 code

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    Advice needed on P2188 code
    Looking for advice from the group. I drive a 09 S5 V8 with Awe Intake. I've been getting P2188 code running to rich on bank 1. I've cleaned the Mass air flow sensor and changed air Filter in case it was dirty. I also tested my o2 sensors to ensure they are working.
    Where else should I be trouble shooting?
    Any advice would be appreciated!!

  2. #2
    Established Member Two Rings
    Join Date
    Jun 09 2017
    AZ Member #
    400850
    Location
    West LA

    have you change injectors and spark plug recently? could be those.

    you can also try to switch sensors to the other bank and see if the code follows the switch. like swap o2 sensors to the other side and if the code follows it is most likely the culprit

  3. #3
    Senior Member Three Rings Azoriano's Avatar
    Join Date
    Jun 28 2013
    AZ Member #
    118021
    My Garage
    2009 S5 V8 4.2l
    Location
    Toronto
    Items for Sale

    Just changed plugs and coils recently. That's all. I'm going to put my old coils back on and see.

  4. #4
    Established Member Four Rings wkhanna's Avatar
    Join Date
    May 12 2017
    AZ Member #
    399355
    My Garage
    needs cleaned
    Location
    Land of Archaic Anachronisms

    how many miles (kilometers) on the car?

    maybe a bad cat?
    Bill

    Practicing Curmudgeon & Audio Snob

    2011 A5 2.0t coupe
    2011 A4 quattro 2.0t (The Wife's)
    1983 Porsche 944 (modified)
    1985 BWM K100RS (since new - Heavily Modified)
    1971 Moto Guzzi Ambassador
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  5. #5
    Senior Member Three Rings Azoriano's Avatar
    Join Date
    Jun 28 2013
    AZ Member #
    118021
    My Garage
    2009 S5 V8 4.2l
    Location
    Toronto
    Items for Sale

    Update!!
    I trouble shooted last night with a friend and found out injector 2&4 are defective. They were stuck open causing extra fuel to get dumped. Which triggered the fault.

    Thank you everyone for the feedback!

  6. #6
    Established Member Four Rings wkhanna's Avatar
    Join Date
    May 12 2017
    AZ Member #
    399355
    My Garage
    needs cleaned
    Location
    Land of Archaic Anachronisms

    well done!!!!!
    Bill

    Practicing Curmudgeon & Audio Snob

    2011 A5 2.0t coupe
    2011 A4 quattro 2.0t (The Wife's)
    1983 Porsche 944 (modified)
    1985 BWM K100RS (since new - Heavily Modified)
    1971 Moto Guzzi Ambassador
    Avatar Chart



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