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Thread: SES codes in 2001 Jeep XJ

  1. #1
    Tuner
    Join Date
    May 2005
    Location
    AZ
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    50

    SES codes in 2001 Jeep XJ

    I'm trying to tune my 2001 4.0 XJ.

    I need to turn off all the code for the automatic transmission (automatic from factory that I swapped to a manual), the rear 02s, catalytic converters and EVAP system. I can make changes and I think I have everything dissabled in the file, but I'm still getting codes and a MIL light.

    I also can't get the VCM Scan to work on the Jeep. All these things work fine on my GM vehicles (C5, Trucks, etc.).

    What am I missing?

    Here's an example of the transmission diagnostics (everything is disabled):Capture.PNG
    2004 C5 Coupe - MM6

  2. #2
    Potential Tuner
    Join Date
    Nov 2019
    Posts
    2
    Just in case, did you catch this switch that can set the transmission from Automatic to Manual? (This kind of switch would often disable all AutoTrans functionality and diagnostics)
    MT vs AT.JPG

  3. #3
    Tuner
    Join Date
    May 2005
    Location
    AZ
    Posts
    50
    Quote Originally Posted by xlr8n View Post
    Just in case, did you catch this switch that can set the transmission from Automatic to Manual? (This kind of switch would often disable all AutoTrans functionality and diagnostics)
    MT vs AT.JPG
    Sure did. That's why I can't understand why it's still looking for the TCU.
    2004 C5 Coupe - MM6