RM European Auto Parts
Results 1 to 10 of 10

Thread: Help PO743 error code

  1. #1
    Join Date
    Mar 2018
    Location
    Texas
    Posts
    6
    My Cars
    2000 740IL Sport

    Help PO743 error code

    2000 E38 recent trans failsafe program has PO743error code replace battery alternator already unplugged ABS with no change.any ideas

  2. #2
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    You need to scan for BMW-codes.

  3. #3
    Join Date
    Mar 2018
    Location
    Texas
    Posts
    6
    My Cars
    2000 740IL Sport
    What scan tool should I get BMM V2.0 from icarsoft is what I am seeing in most of the videos.

  4. #4
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    Well then, here are some options,
    concerning diagnostic tools,

    For a good BMW scan tool, I feel you have 3 options:

    • Foxwell nt520:http://www.foxwelltool.com/search/?q=NT520
    • Carly for BMW:http://www.mycarly.com/product/bmw-app/
    • INPA software for BMW: Do a search on bimmerforums

      I recommended them in no specific order,
      as selection is based more on preference.

      INPA is an excellent diagnostic tool,
      but is a proprietary BMW factory tool.
      So all available copies are technically bootleg versions.
      This requires a copy of the INPA software downloaded into a laptop computer,
      along with the correct cables for your particular model of BMW.
      I recommend this only for computer geeks, or the mostly computer savvy among us.

      For an affordable standalone unit, Foxwell nt510(nt520 Updated version) is the preferred unit, along with required cables.
      It can scan for BMW codes, among other things, as it can communicate with all BMW modules.

      Carly for BMW is an APP,
      and as such, requires a smartphone,
      along with a connection to the OBD2 port in your vehicle,
      supplied either by cable or wireless connection via Bluetooth dongle


    Update: Now the full version is $74/year on a recurring subscription
    Last edited by MIKYZZ4; 07-12-2018 at 05:09 PM.

  5. #5
    Join Date
    Mar 2018
    Location
    Texas
    Posts
    6
    My Cars
    2000 740IL Sport
    I will download Carly as I already have a Bluetooth OBD II adapter and have been using torque pro II as a generic code reader will update as we go thanks so much for the help. I love this car and get it at a steal of a price engne is strong and until now was great. Just gotta get this trans failsafe mode stuff taken care of.

  6. #6
    Join Date
    Jul 2004
    Location
    Houston, TX
    Posts
    12,462
    My Cars
    36 Cylinders
    Carly will not work with generic bluetooth adapters. It has to be one of their approved adapters.

    - - - Updated - - -

    Suggestion is to stop throwing random parts at it and diagnose the car correctly. It will save you lots in the long run. A cheap 7 series is often a nightmare, or at least a hassle.
    -Abel

    - E36 328is ~210-220whp: Lots of Mods.
    - 2000 Z3: Many Mods.
    - 2003 VW Jetta TDI Manual 47-50mpg
    - 1999 S52 Estoril M Coupe
    - 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
    - 2019 M2 Competition, self-tuned, 504whp
    - 2016 Mini Cooper S

  7. #7
    Join Date
    Jun 2002
    Location
    Aberdeen, NC (yes, again)
    Posts
    23,673
    My Cars
    E39M5, E500 4WD
    A 7 series at a "steal of a price"....imagine that.

    Please, don't get me wrong....I believe that the E38 is the very best big car in the world, ever. Still, the reason that 7-series cars, and S-class Mercedes lose 98% of their vale is because they aren't taken care of, as they age. They're passed along to the next guy, instead of fixing them. And the next guy doesn't fix what's wrong, either.

    Miky's absolutely right: you need to be able to read BMW codes from all the computers. I'd mention that you will NOT be able to do this, on your car, with something that plugs into the OBD port. You have a 20-pin diagnostic connector, underhood, and that's where you need to plug your diagnostic tool. This might or might not rule out the Carlys and Torque things.

    All this said; none of us believe in OBD codes, because they're so grossly inaccurate for diagnosing BMWs. But I googled P0743, because it's all the information we have....and it says "Torque Convertor Clutch Solenoid"....so I can't imagine why you replaced the battery and very expensive alternator? Hope you got the alternator from a BMW specialist supplier, not Autozone or OReilly.

    Unplugging the ABS wasn't wise, because it has nothing to do with this code, and you may not be able to clear the codes you created without plugging into the 20-pin port, using a BMW diag tool..

    Sorry....

    - - - Updated - - -

    What do you know....the best BMW computer guy I know overlapped (I'm slow at typing). But note that we agreed.

    You can't fix it 'til you know what's wrong. Diagnose first.

    Chris Powell
    Racer and Instructor since, well. decades, ok?
    Master Auto Tech, owner of German Motors of Aberdeen
    BMWCCA 274412
    German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471

  8. #8
    Join Date
    Mar 2003
    Location
    St. Joseph, Mo.
    Posts
    3,000
    My Cars
    95 m3+, 03 ZHP, Mk4 Tdi
    Yup. Carly needs their adapter. It will work on 20 pin cars.
    So will the nt510.
    I have both. In general I prefer the Foxwell.
    '95 325iS - auto to manual swap done!

  9. #9
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    If you are computer savvy,
    INPA is my preference!
    When I have built up my skills,
    INPA will be my preferred tool!

  10. #10
    Join Date
    Mar 2003
    Location
    St. Joseph, Mo.
    Posts
    3,000
    My Cars
    95 m3+, 03 ZHP, Mk4 Tdi
    I have inpa too. It has its place.
    I just like not having to pull the laptop out.
    '95 325iS - auto to manual swap done!

Similar Threads

  1. Need help on Error Code
    By man528i in forum 1988 - 1996 (E34)
    Replies: 0
    Last Post: 03-17-2006, 04:12 PM
  2. Need help with error code
    By Tadams in forum 1988 - 1996 (E34)
    Replies: 2
    Last Post: 03-13-2006, 01:11 AM
  3. 840 Ci Please help with error codes
    By kidstuff007 in forum 8 Series (E31)
    Replies: 2
    Last Post: 01-17-2006, 04:27 AM
  4. Need help with error code E4 on my 2001 330ci
    By M3inNC in forum 1999 - 2006 (E46)
    Replies: 4
    Last Post: 10-13-2005, 07:49 AM
  5. need help with error code
    By pelos in forum General BMW Mechanical Help sponsored by RM European Auto Parts
    Replies: 0
    Last Post: 11-23-2004, 07:53 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •