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Thread: S50b32 Fault Codes

  1. #1
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    S50b32 Fault Codes

    I have a '95 M3 with an Euro S50b32 swapped. Using a Foxwell scanner I'm getting the following codes, but cannot find out what they mean:
    8a DTC -DME: DMS Digital Motor Electronic: fault stored
    2a DTC -DME: DMS Digital Motor Electronic: fault stored
    42 DTC -DME: DMS Digital Motor Electronic: fault stored
    35 DTC -DME: DMS Digital Motor Electronic: fault stored

    12 Instrument Cluster code 20 DTC Ignition Key Contact Operation not plausable

    The car fires up and idles just fine, but during moderate acceleration I can hear a "wha, wha, wha" as the engine revs. I hope that understanding what those codes means, I can chase down what is causing that noise.
    Thanks for your help!

  2. #2
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    S50B32 is an engine found in european spec cars, which usually have a 20pin round BMW connector in the engine bay. If your car has such a connector then get a cable and the software to read codes through that, it will give a more detailed code description.

  3. #3
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    I have the Schwaben by Foxwell BMW/MINI Scanner 14020SCH with the 20 pin adapter and those are the codes that showed up. I am struggling to find any resource or software to interpret what those codes mean.

  4. #4
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    If nobody can tell you what the codes mean and you can't find it using google, then I don't see another option besides trying INPA and hoping it can give you more information.
    Also, INPA can provide more engine data and values that could help diagnose your problem.
    Last edited by samy01; 03-17-2022 at 08:38 PM.

  5. #5
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    I think you should use INPA, software is free in the z3 diagnostics forum. Get the cable off eBay or Amazon.
    Avoid Vogtland Suspensions! Rusted then failed!

  6. #6
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    Google showed the following:

    8a code was related to body control module

    2a code was a speed sensor

    42 and 35 were related to the dsc stability system.

    Not sure how accurate these are, take it with a grain of salt.

    Sent from my SM-G975U using Tapatalk

  7. #7
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    Moved to E36 M3 forum from E36 forum
    Shogun tricks and tips for the E32 series are HERE!

  8. #8
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    Do you feel a hesitation during acceleration or is it just a noise? Was the vanos ever rebuilt?

  9. #9
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    Quote Originally Posted by shogun View Post
    Moved to E36 M3 forum from E36 forum
    Why not into the Euro specific sub?
    ‘98 BMW M3 3.2 SMG Cabrio • Alpinweiß III auf Schwarz • Deutschland-ausführung
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  10. #10
    MauiM3Mania's Avatar
    MauiM3Mania is offline Observer/Master Skeptic Moderator
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    Quote Originally Posted by MParallel View Post
    Why not into the Euro specific sub?
    Done.
    Sat/Sun| 04M3 TiAg 69k slick-top 3 pedal
    Auto -X | 99M3 61k S50B32 284° euro 6Spd 3.91
    On The Market
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    WTB: 3.5" Eurosport/Conforti CAI

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  11. #11
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    Quote Originally Posted by MauiM3Mania View Post
    Done.
    *like*
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  12. #12
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    The VANOS seals were replaced 10k miles ago. There is a slight hesitation during acceleration when that noise is present and then the noise disappears when holding a constant speed.
    I appreciate everyone's comments and helps as I chase this issue down.

  13. #13
    MauiM3Mania's Avatar
    MauiM3Mania is offline Observer/Master Skeptic Moderator
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    I have nothing to add but am curious what sort of mileage is on the engine.
    Sat/Sun| 04M3 TiAg 69k slick-top 3 pedal
    Auto -X | 99M3 61k S50B32 284° euro 6Spd 3.91
    On The Market
    Project | 88M3 AW 43k miles


    WTB: 3.5" Eurosport/Conforti CAI

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