Dtc Code

Discussion in 'Bonneville' started by 243jimb, Jan 10, 2026.

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  1. 243jimb

    243jimb Member

    Nov 27, 2018
    13
    8
    Canada
    #1 243jimb, Jan 10, 2026
    After a cylinder head removal and replacement on my '24 T120 it does not want to start and I am getting a code P28-01. After searching this it comes up with Oxygen sensor (not disturbed) or transmission code, I don't know which it would be. I don't have Tune ECU.
     
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  2. Robbi18

    Robbi18 Member

    Jun 15, 2025
    25
    18
    United States
    #2 Robbi18, Jan 11, 2026 at 2:14 AM
    Check all the connections you unplugged, especially the small ones for the cam sensor or crank sensor. That code is often a cam/crank sync issue. Did you time the cams exactly right? Double-check the timing marks. A sensor left unplugged or mis-timed cams will cause a no-start with that code.
     
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  3. 243jimb

    243jimb Member

    Nov 27, 2018
    13
    8
    Canada
    #3 243jimb, Jan 11, 2026 at 4:44 PM
    Thanks, I have discovered that it is related to the fuel injector on Cylinder 1.
     
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  4. Eldon

    Eldon Crème de la Crème

    Nov 14, 2018
    9,123
    1,000
    North Yorkshire
    #4 Eldon, Jan 11, 2026 at 6:19 PM
    Please expand, damaged jackplug, cut wire, other etc ????
     
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  5. 243jimb

    243jimb Member

    Nov 27, 2018
    13
    8
    Canada
    #5 243jimb, Jan 11, 2026 at 6:27 PM
    No damage, I'm investigating.
     
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    • Agree Agree x 1
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