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ISX 550 kenworth coolant level

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Perchie15, Nov 9, 2023.

  1. Nov 9, 2023 #1
    Perchie15

    Perchie15 Light Load Member

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    Aug 16, 2021
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    I am having issues with a ISX Cummins it keeps saying low coolant but it’s topped up, I bypassed the prongs coming off the sensor only 2 prongs there but still showing the light. It’s one of them hard plastic reservoirs. Even when I disconnect the plug
    From the sensor still says low coolant!! Meter reading 5.0k ohms off the sensor
     
    Last edited: Nov 9, 2023
    Perchie15, Nov 9, 2023
    Perchie15, Nov 9, 2023
    #1
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  3. Nov 10, 2023 #2
    Transportauto

    Transportauto Light Load Member

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    Apr 10, 2022
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    Sounds like wiring back to the ecm.
    Test them for resistance to ground verify there integrity.
     
    Transportauto, Nov 10, 2023
    Transportauto, Nov 10, 2023
    #2
  4. Nov 11, 2023 #3
    TJB15

    TJB15 Light Load Member

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    Apr 29, 2020
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    If it is like mine (2013 660) there is a float inside the tank that will stick and cause this. Unplugging sensor check engine light stays on low coolant specific light goes off. Just a thought. Could be lots of other things as well.
     
    TJB15, Nov 11, 2023
    TJB15, Nov 11, 2023
    #3
  5. Nov 11, 2023 #4
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    I had the same issue on my 2014 Pete, I changed 2 coolant sensors(different times), the light went away each time then come back on. Then I changed the coolant reservoir(was already getting deteriorated), light still wouldn’t go away. So I had a tech look at it and ended being a wiring issue by the ECM.
     
    Diesel Dave, Nov 11, 2023
    Diesel Dave, Nov 11, 2023
    #4
    Perchie15 Thanks this.
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