Mine seems to be working just fine. It is possible your TPMS sensor(s) going bad (break or battery bad). It would mean you would have to pull tire off and service the module in the wheel, then put tire back on.
Best done when you are changing tires, or you will have charges (probably about 20 bucks for tire un/mount, then maybe 50 bucks for pd and service. If module needs replacing, you would have to add that cost as well.

 

Durametric tool or dealer tool can plug in and tell if batteries going bad. If they are original that could be it.

 

Batteries in the TPMS last around 7 years.

 

Any tire shop can at no charge scan your tpms sensors and tell you if batteries low. Go to one and ask. 2 minute check. Good luck.