Originally posted by Snake_Eyes.
Edited by SuperModerator.
Default settings for HD TPMS systems are quite high. Some owners report they cannot find a desired tire size that will accommodate the higher pressures so they must make a choice between wearing out their new tires prematurely or dealing with constant EVIC warnings, a Low Tire Pressure warning light and a rough riding truck.
There is a fix.
This has been confirmed to work on any 2014+ HD truck and on any model. You will have this done at a dealer per the instructions below. It is recommended you print them and take them with you. The technician should be able to change your settings and turn off the light.
Step 1: Go into the BCM (body control module). Go to "miscellaneous functions". Go to "update pressure thresholds". Set pressure to desired settings. Do not try to do different pressures front and back! Even if you run 10 psi difference front to back you won't get a light. If you plan to run 10 psi difference I suggest your "setting" be in the middle of the high and low just to give you a little cushion.
Step 2: Go into the RFH (radio frequency hub). Go to "miscellaneous functions". Perform "RFH replace" and follow prompts. You will need the PIN number for the truck. That can be obtained through Dealer Connect with the vin number to the truck. When following the prompts - when asked for desired pressure setting - set new pressure levels. You do not need to replace anything - just perform the function to set new levels.
Once the RFH replace function is done the light goes out and the truck will read new pressures after driving a short distance.
More Information on HD TPMS Reset Options
This information was originally started & gathered in the CumminsForum.com thread How to set TPMS to ANY pressure which is similar to this thread. It has 1700+ posts with info changing half way thru and much confusion. 4x4x4door created that thread to help clear up confusion and help as many as possible. Special thanks goes to Indytruckchampion(CF member) for creating that thread with the process and to articsilber323 for figuring out that the Autel Maxisys can do this since FCA removed the ability from the dealers. PLEASE read the common questions below before asking questions.
General info:
To fully adjust the TPMS you need the change the psi thresholds and update the RFH (Radio frequency hub).
Factory pressure settings are 60(Hemi) or 65(Cummins) front & 80 rear with a 20% threshold which means that the warnings (light, sounds & nag screen) will come on at 48(H) or 52(C) front & 64 rear. If that happens then you will have to air the tires to 60(H) or 65(C) front and/or 80 rear to make the warnings go away.
The PIN – You must have your PIN to fully adjust the TPMS system. There are 2 PIN numbers associated with your key and truck. Technically, there's a 3rd one too that's a rolling code (unknown digits) that expires. It is only used if you lose all your keys and it requires a call to Lord FCA to get. I believe this is where some dealers get confused and try to tell you that the 4-digit PIN will expire. I've not heard of anyone saying that theirs expired when they tried to use it. A few members have been charged a fee to get the code. This ridiculous and I’d find another dealer, but I realize some don't have that choice.
PIN #1: 4-digit code (all numbers) that is used to program the key (fobik) to the truck. This is the one you need for this process.
PIN #2: 5-digit code with a letter in front (ex. M0000) that is used to cut a new metal key.
It’s a good idea to get both codes as soon as you possibly can. Recently, some dealers have refused to give them out.
Devices:
Autel MaxiSys -- will adjust the psi settings and update the RFH (Radio frequency hub)
Launch X431 -- very similar to the Autel MaxiSys with possible same functionality
Matco Maxgo & Maxme -- supposed to be able to adjust the psi settings & update the RFH (Maximus should also)
AutoEnginuity software -- will only adjust the threshold psi settings (also custom tire sizes & enable fogs w/highs)
Witech (dealer) -- will only update the RFH, IF you can find a dealer that's willing do it
AEV ProCal -- only sold with their lift kits; will only adjust the psi settings (tire sizes & other settings)
Snap-on – no one has found that any of their devices can do this
Common questions:
Q: Can the dealer do this?
A: They cannot change the psi thresholds but they have the ability to update the RFH. Whether they or not is questionable.
Q: Is there someone near me that can do this?
A:
***HERE*** is a map that 4x4x4door created showing all known members that have a device. If there'e no one close enough to you, try contacting 4x4x4door or BPMPVET.
Q: Will this ‘change’ get removed if I get a flash update from the dealer or if I install a tune.
A: No
Q: Will this ‘change’ void my warranty.
A: First they have to prove that it caused a problem and how they gonna 'see' it? The Witech can't get to the settings but anything's possible.
Q: What model of Autel MaxiSys can do this?
A: The common model is MS906 but any MaxiSys model should have this ability excluding Dodge software version 7.5.1. The MaxiDAS cannot do this process and I doubt any MaxiTPMS will either.
Q: Can the Autel MaxiSys make other adjustments like larger tires or enable fogs w/highs?
A: It’s a very powerful diagnostic device but it can only adjustment to other factory tire sizes and cannot enable fogs w/highs.
Q: Where can I find the instructions do make the adjustments?
A: articsilber323 provided these in post #912 in the original thread. Some of the screens have changed slightly with the newer software versions but the process is generally the same.
