Cat code 1 2

Discussion in 'Trucks [ Eighteen Wheelers ]' started by T800H, Jan 10, 2012.

  1. T800H

    T800H Medium Load Member

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    Apr 2, 2010
    The Keys
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    I have the check engine light flashing and it's giving me 1 2 code, any one knows what that is?

    1999 1LW 475, with a 5EK ecm running a test.
     
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  3. Duramaxxed

    Duramaxxed Light Load Member

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    Jan 2, 2012
    Bourbonnais, IL
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    12 is a coolant level sensor fault
     
  4. T800H

    T800H Medium Load Member

    608
    295
    Apr 2, 2010
    The Keys
    0
    Thank you Duramaxxed.
     
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