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Water temperature gauge not working properly

Discussion in 'Experienced Truckers' Advice' started by Gurjap, May 29, 2021.

  1. May 29, 2021 #1
    Gurjap

    Gurjap Light Load Member

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    Mar 18, 2020
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    Hello, I have a 2010 Kenworth t800 with a Cummins isx. It’s water temperature gauge doesn’t always work. It’s reading will either get stuck at a single point or completely goes to 0. In a day of driving near the end of the drive it starts to malfunction. When the truck remains off over night, it will work the next morning. Anybody know what the problem is? And does anybody know the location of the sensor? I can’t seem to find it.
     
    Gurjap, May 29, 2021
    Gurjap, May 29, 2021
    #1
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  3. May 29, 2021 #2
    Ridgeline

    Ridgeline Road Train Member

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    This should be a multiplexed gauge, the sending unit sends a signal to the ECM and the ecm runs the gauge.
     
    Ridgeline, May 29, 2021
    Ridgeline, May 29, 2021
    #2
    AModelCat Thanks this.
  4. May 29, 2021 #3
    AModelCat

    AModelCat Road Train Member

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    Being multiplexed, I would think that a faulty sensor or wiring to/from the ECM would throw a code.

    If the ECM is seeing correct temperature when the gauge is acting up, I'd suspect the gauge could be on its way out.
     
    AModelCat, May 29, 2021
    AModelCat, May 29, 2021
    #3
    slow.rider Thanks this.
  5. May 30, 2021 #4
    snowwy

    snowwy Road Train Member

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    Here's a question.

    You ever seen oil heat up before coolant?
     
    snowwy, May 30, 2021
    snowwy, May 30, 2021
    #4
  7. May 31, 2021 #5
    Ridgeline

    Ridgeline Road Train Member

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    I have,
     
    Ridgeline, May 31, 2021
    Ridgeline, May 31, 2021
    #5
  8. May 31, 2021 #6
    AModelCat

    AModelCat Road Train Member

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    Can't say that I have. Maybe if there's a retarder that's sticking on but not sure what else would cause it. I don't really have a whole lot to do with engines anymore.
     
    AModelCat, May 31, 2021
    AModelCat, May 31, 2021
    #6
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