So playing with the tire pressure I remembered that my 17 Rebel was 55 Psi Front/ 45 Rear. I know the power wagon is heavier so I am trying 58Psi Front and 52 Rear. Also memember H3LZSN1P3R was right if you go into settings and select tire fill alert on and then go to apps and select tire fill alert you can set two presets for tire pressure and adjust the threshold.
I found this same setting when I purchased my new 2022 RAM Big Horn. Its called "Selectable Tire Pressure Monitoring System". As far as I can tell it allows you to set the Tire Pressure to the amount you want to run your tires. I seldom tow a heavy load so I want a smoother ride. I aired my tires to 55psi all the way around and set the Selectable Monitoring System to monitor the pressures at 55psi.
This set up worked for about a year with no problem even with a 3-4 psi threshold given the pressure changes from a cool morning to a hot afternoon and while driving. After about a year I started my truck one morning and the system identified both my rear tires needed air. The cluster on the dash identified both front tires at 51psi but they were not highlighted in "Red" therefore no air needed. Both rear tires showed 52psi and 53psi and were highlighted in "Red" with a warning to air the rear tires to 65psi and the flat tire amber indicator light on dash stayed on.
I took my truck to the dealership and in order to reestablish the settings they had to air up the rear tires to 65psi, drive the truck a few miles until the system reset itself and then reduce the air in the rear tires to 55psi again. This worked for about 3 weeks whereas the system again malfunctioned with the same scenario. All 4 tires indicated low pressure but only the rears needed air.
Another trip to the dealership and again everything was checked and reset. According to the dealer, (I personally know the Maintenance Manager) all four TPMS in each tire were working properly. This tells me the Valve Stems are sending the correct psi for each tire to the receiving module, wherever that module is located. I understand there is a module near the rear of the back seat that relays the information from the tires to the dash cluster. I may be wrong.
After the fourth time to the dealership with this problem (once after a few days and once after a few months), I was told I would have to run the tire pressures to the same psi identified on the label on the door jam. That being 60 front and 65 rear. I disagree based on the fact over time tires wear out and are replaced. My next tires may not be a 10ply tire with a 65psi rating. During my 23 year military career in the transportation business I was taught to never go by this label. It's always recommended to go by the tire pressure identified on the sidewall of the tire. The Tire Manufacturer mandates the correct tire pressures for the tires they manufacture not the automobile builder. Should a tire blow and cause an accident where a death occurs, the insurance companies will go after the manufacturer of the tire before bringing in the automobile manufacturer. I was also told the Selectable function is only used while airing up your tires. You set the PSI amount and when you air up the tires the truck will flash the 4-ways when you have reached the selected amount. Again!! Why have the ability to set pressures different than what is stated on the door frame label if the system doesn't recognize the psi's selected by the consumer?
Which brings me to my question.... Dealer says Chrysler states you have to maintain 60psi front and 65psi rear in order for the TPMS to work properly. If this is indeed the case, why bother with allowing the ability to change these settings in the configuration? Why not just use the same system used in other Chrysler vehicles?
My other question is why is it always the rear tire pressures that cause the system to identify low tire pressure? Shouldn't the front tires also cause the system to identify low tire pressure? I do believe when the government mandated that all auto manufacturers in the United States provide this system of monitoring tire pressures for Safety and Fuel Consumption they required all 4 tires to be monitored properly.
I have a truck still under warranty and a TPMS that fails to function properly.
Anyone else having this problem? I'm thinking it may be a memory problem because it only happens when I park the truck overnight and the ignition is shut down. It never happens while driving down the road. I do know the UConnect5 System in my truck loses memory placement on my music selection constantly or the system forgets what screen it was on when I stop to get gas or run errands.
