Whats the solution for the dreaded QLS sensor defect?

Discussion in 'International Forum' started by irishluck09, Aug 26, 2021.

  1. irishluck09

    irishluck09 Light Load Member

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    Has anyone come up with a solution or temp fix to get our trucks running with a bad QLS sensor?
    (17 lonestar isx15)

    Im being told that these sensor are on nationwide backorder anywhere from 2 weeks to 6 months.
    I cant be down that long. I have a family to feed as Im sure others do as well.

    Whats the fix here?
     
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  3. Arctic_fox

    Arctic_fox Heavy Load Member

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    The only current fixes are to do a snip snip that shall not be named due to forum rules. Find a wrecked truck that has a working example on it at a junkyard. Buy used/refurbished from an iffy ebay seller. Or to start cold calling every single dealer in an expanding circle around your location that can work on an isx with your part number and asking if they have one. If you do the last one and they do buy it and have it overnighted to your current location.
     
  4. ChuckMartel

    ChuckMartel Light Load Member

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    Just to clarify, this is not just an International, every manufacture is having issues right now. Word is they are working on an emergency Calibration that will use a “virtual” QLS sensor and use your Nox inlet and outlet sensors to determine quality. Not sure of a timeline but at this point you’d think it’d be soon
     
  5. ChuckMartel

    ChuckMartel Light Load Member

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    And just to add, heard a rumour guys are having some luck putting the sensors in a bucket with ice and water for about 20 min. and then reinstalling. Who knows how long it lasts for though.
     
  6. irishluck09

    irishluck09 Light Load Member

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    I mean can the sensor be cleaned or what? I was reading up somewhere that it has to do with the silicone chip inside basically getting to hot from the coolant lines and causing the chip to fail.
     
  7. Kyle G.

    Kyle G. Road Train Member

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    Mine went out a couple months ago. Truck sat for two weeks before our dealer could find one, and he made it sound like he had to pull a lot of strings to get it. I believe I may have gotten one of the last ones in the country lol.
     
  8. ChuckMartel

    ChuckMartel Light Load Member

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    Yes, either is gets too hot from the Def tank heater valve failing or to high of ambient temperatures heating up the def and wrecking it.
     
    runningman0661 Thanks this.
  9. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Try dealer again. Mine ordered from DC (Illinois) and had it next day.
     
    baha Thanks this.
  10. Heavyd

    Heavyd Road Train Member

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    Just buy a pair of vise grips and pinch off the coolant hoses to the tank if your QLS still has a pulse.
     
    avgdzlmekanic, Flint1 and QUALITYTRUCK Thank this.
  11. irishluck09

    irishluck09 Light Load Member

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    Well I went and did a test drive on it and it didnt derate me. Even topped it off with DEF fluid (.8 gallon).
    We have been getting pretty high temps here the past week. About 100*. The code started popping when I let the truck idle for about 2 hours.

    I have a new one on order from the local dealer. But said it would be 2 weeks to a few months.
     
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