To make this even more strange we had a trip planned today to go south to Florida and I decided to take the CRD for the road trip instead of my wifes Patriot. 2016 Patriot is way newer and probably more reliable but I wanted to take the liberty on a long run. Now with the tires reduced pressure to spec cold at 33-34 in Kentucky at around freezing outside off we went.
Made an easy day of about 500 miles and no issues but as the tires warmed up and the air temps got above 70 the pressure readings climbed to 40-42, and not a problem. May need to adjust them again in the morning after they cool off cause its going to be up in the mid 80's by the end of the trip
could end up looking like this pepper guy by the end of the week without lots of sunscreen.
It seems it can read pressures that high if they go up while its running or if you over inflate but it couldn't reset itself from a high pressure start after a disconnect due to a high limit setting in either the WCM or ECM.
I read about Wrangler owners using a AEV Procal being able to reset the pressure parameters where the high and low limits are when they run oversize tires for offroad after a lift ect. and also deleting the TPMS to get rid of dash lights and EVIC warnings when running tires without sensors in them.
I like my TPMS being able to warn me if a tire is going low while travelling so I wouldn't turn it off but I can see where it could come in handy to temporarily turn it off when running low pressures for off road fun without having lights bells and warning messages pop up.