So I kept seeing I would need to have either a shop program new tpm's I just put in a new set of wheels. I bought ford oem units and put the new wheels on today fully expecting a notification on the dash. Within a few miles they seemed to sync to the truck was reading pressures. Is it only with aftermarket units people are having trouble? More of a curiosity at this point

 

Me, too. I bought OEM for our Mazda and no problem. I got aftermarket for the F-150 and they had to program them.

 

The proper sensors work automatically.

 

I can tell you for sure my 18 knows exactally where each tire (OEM rims and tpms Sensors) is within a few miles. I know this because I rotate every 5000km with my oil change and run 42psi up front and 40psi rear (I never haul anything but the wife and kid lol)

 

No need to relearn I have 2 sets of rims and tpms. I change them every winter without relearn.

 

Not sure, i seem to have a problem with buying trucks and wheels/tires.

Without actually counting, i have gone through at least 7-8 sets of wheels and tires on my 3 F150's ive had, some OEM, some not, some oem sensors and some not. I have never had to do anything other then to just "drive" the truck.

I had an issue once where the old wheels and tires were stored about 20ft away, so the truck never recognized the new ones until i physically moved them and then took the truck on a decent drive.

Another instance, on my 2020, i sold the truck and put stock wheels and tires WITHOUT sensors in them...for over a week, i drove to and from work (6 mile trip), and it never gave me a warning until i drove the truck to the dealer that was buying it (22 miles away). So it seems the truck needs to be driven a good 15-20 miles for it to re-learn.