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Thread: C0558 hard code after reflashing for a gear change

  1. #1
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    Default C0558 hard code after reflashing for a gear change

    So I went and changed the gears in my 2005 Yukon yesterday from 3.73 to 4.56 gears and after making the initial calibration change for the gear ratio, I got a hard C0558 code which is "calibration Data Not Programmed/Learned". I have tried to put the original cal back in to see if that would revert it back but no go. Any ideas of what happened when I flashed the ECU? I have not had this code at all before flashing it yesterday.

  2. #2
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    Do you have separate engine and transmission tunes, and if so did you make the change in both of them? Can you post your tune files?

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  3. #3
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    It's a LS1b ecu so both the engine and trans cals are within the same ECU and are not separate.

  4. #4
    Joe (Moderator) joecar's Avatar
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    C code is from either body/chassis controller or ABS controller...

  5. #5
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    I saw the code description when I pulled the code. I was just trying to figure out how the ABS module lost it's cal info after I changed the gear ratio in the ECU.

  6. #6
    Forum tyhee Site Admin GMPX's Avatar
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    It didn't it must know there is now a mismatch between the ECM and ABS.
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  7. #7
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    I tried to put back the original call and the code is always there though. With that, I have to guess that the ABSinfo got erased with the reflash.

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