Lowering TPMS Threshold with JScan??

wayoflife

wayoflife

Administrator
Staff member
So, I've tested out all kinds of programmers in the past including Tazer, Tazer Mini, Superchips, ERCI (and way more on a JK) and most recently, I've been using JScan on our new 2023 JT Gladiator and mainly because of everyone raving about how good it is. That said, I've been having problems lowering the TPMS threshold and was hoping some of you experts out there can help me figure out why it's not working.

I should note, I was able to lower it to 20 PSI and it reads as much on the dash but even though all the tires are reading 29-30 PSI, they're still in RED, the TPMS light on the dash is illuminated and I get the screen that says I need to inflate up to 20 PSI :rolleyes:

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And, in case you're wondering, I did do the reboot and tried clearing codes but there weren't any.

Any thoughts? I appreciate your help :)
 
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Hmm that’s odd. Mine worked fine first try and I haven’t had issues. I’m not much help since I haven’t really touched the app since I did it two years ago.
 
OverlanderJK said:
Hmm that’s odd. Mine worked fine first try and I haven’t had issues. I’m not much help since I haven’t really touched the app since I did it two years ago.
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The app has changed and no longer has the 'threshold' options. It now has a 'Light Load' and 'Max Load' setting you have to set. It was kind of confusing to figure out but I followed the instructions they have on their website and so far as I can tell, everything is set but I still get the error. Kind of annoying and maybe it's just a JL/JT thing.

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This is right off the JScan website for lowering the threshold.

Changing TPMS thresholds​

This is a simple change, and again - it is highly advisable to not have any TPMS warnings active.
  1. Connect to your vehicle
  2. Open Adaptation
  3. Open TPMS settings
  4. Set TPMS thresholds in the applicable setting(s) from the following list:
    • TPMS Threshold: for vehicles equipped with the basic version
    • TPMS Threshold - EVIC version: well… yes, for vehicles with the premium version
    • Light Load Inflation Pressure Front / Rear Tire: Leave at 0.
    • Max Load Inflation Pressure Front / Rear Tire: This value is used as the minimum pressure when the vehicle is fully loaded. Change this value first and see if it does the job.
    Click to expand...
  5. Reset the TPMS:
    • Close the car, let it sit for a few minutes. If you see no change in behaviour, continue to the next step:
    • On most vehicles disconnecting the battery for a few minutes resets the TPMS, however:
    • some newer vehicles have others systems relying on a constant power supply, so instead you can use !Restart all ecus option (usually available in Miscellaneous Settings section).
    Click to expand...
 
bobsled84088 said:
Be sure and drive it after making the changes . I set my parameters and it took a couple of miles before the tpms light went off.
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Thanks for chiming in with that. I was wondering if that might help. On something like a Tazer or ECRI, they just work without having to do that so I wasn't sure.
 
Only one I've used is the ECRI, on my '21. It works flawlessly there.
Wondering if Jeep has made another TPMS change like they did earlier on.
 
Okay, just wanted to post an update and say that bobsled84790 was right with his suggestion. I took BANDIT for a drive and within a few miles, the TPMS readings started to clear, one tire at a time. After all 4 were no longer showing up in red, the error light on the dash went out and I haven't had a problem since. Thanks again for the help bobsled84790 (y)
 
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