F430 - Wrong OBD Codes? P1090 | FerrariChat
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F430 - Wrong OBD Codes? P1090

Discussion in 'Technical Q&A' started by Steven D Hurley, Oct 12, 2018.

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  1. Steven D Hurley

    Steven D Hurley Rookie

    Aug 28, 2018
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    Steven D Hurley
    #1 Steven D Hurley, Oct 12, 2018
    My Check Engine Light came on so I scanned it with a basic tool. ELM 327 (ebay bluetooth unit with an app on my phone) and got the code P1090.

    This is the description: P1090 Pre-Catalyst Fuel Trim Too Lean Bank 1


    1. Am I using the right obd2 scanner tool? I can't find this code to match any of the specific Ferrari code list's from this forum.
    2. If this is the correct code/description, has anyone had this before? What was the solution? Any ideas?
    Thanks in advance.
     
  2. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    6,864
    Central NJ
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    Dominick
    #2 flash32, Oct 12, 2018
    This code means that on the passenger side of the engine one or more of the cylinders is not getting enough fuel or too much air .. it can be a large vacuum leak, maf bad or bad fuel injection

    More anaylsis is needed

    Sis this just appear or was after an certain event ?

    Sent from my moto x4 using Tapatalk
     
  3. Steven D Hurley

    Steven D Hurley Rookie

    Aug 28, 2018
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    #3 Steven D Hurley, Oct 12, 2018

    It happened a few days ago after I put in a small bottle of octane booster, then drove it pretty hard. I'm not sure if that event is related or not.

    I reset the CEL a few times, but it immediately pops back on after restarting the car.
     
  4. flash32

    flash32 F1 Veteran

    Aug 22, 2008
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    Central NJ
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    Dominick
    #4 flash32, Oct 13, 2018
    First start with basic visual of engine bay... Any loose /disconnected hoses / bellows ) connectors

    Then start engine and try to listen for abnormal hissing /sucking noise .. also listen to area of exhaust header and see if got a large crack etc

    Always can listen to one side vs the other

    The next step is to get some reading from o2 sensors , maf sensor etc with a diag tool

    Sent from my moto x4 using Tapatalk
     
  5. greyboxer

    greyboxer F1 World Champ

    Dec 8, 2004
    12,661
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    Jimmie
    #5 greyboxer, Oct 13, 2018
    The code isn't quite right but is there the slightest chance that the gas cap is not correctly replaced as this is quite a common source of CEL 0n 430 ?
     
  6. Steven D Hurley

    Steven D Hurley Rookie

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    #6 Steven D Hurley, Oct 24, 2018
    I have it at the "Ferrari Doctor" in San Francisco, so I will let you know what they come up with.
     
  7. Steven D Hurley

    Steven D Hurley Rookie

    Aug 28, 2018
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    #7 Steven D Hurley, Jun 10, 2019
    it ended up being the Mass Air Flow sensor. Got a new one, and it works perfectly.
     
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  8. flash32

    flash32 F1 Veteran

    Aug 22, 2008
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    #8 flash32, Jun 10, 2019
    Glad you got it sorted ...

    Sent from my moto g(7) using Tapatalk
     

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