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Thread: E34 Error code 54 ???????

  1. #1

    Default E34 Error code 54 ???????

    Further to my note about my 520i '95 Touring a few days ago running flat as a pancake, no power etc etc, the local (non-BM) garage say its coming back with an error code of 54 when they plug their diags in.

    Anyone have an idea what fault this code relates to please?

    They looked in their book and it listed fault descriptions for 1-53, and 55-200+ but a blank for 54!

    TIA
    Rick
    (wishes he'd hung on to his 750i and Merc 300TE instead)

  2. #2
    Join Date
    Jan 2004
    Posts
    4,148

    Default You need to specify which version of the dme you have

    Its most likely version 3.3.1 and if it is then the error code 54 is for
    Dme control -unit power supply via main relay...
    Whether that helps you any i don't know...

  3. #3

    Default

    Quote Originally Posted by Bill R.
    Its most likely version 3.3.1 and if it is then the error code 54 is for
    Dme control -unit power supply via main relay...
    Whether that helps you any i don't know...
    hi Bill

    thanks - not sure on version, only recently bought this thing unfort.

    rgds
    Rick

  4. #4

    Default

    3 possible problems for code 54
    1/. Engine control module (ECM).
    2/.Transmision control module (TCM).
    Both are communication faults (wiring short to earth, TCM trouble codes stored.
    3/. Battery voltage-too low/high
    fault could be wiring/alternator/battery
    1989 e34 520i se, red, mint condition (original)
    pro mechanic "all cars"

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