TPMS problem

What exactly do you mean it works and it doesn't work ? Did you have any recent work done to the tires or wheels ?
The tpms light comes on or not ? It should tell you how much pressure is in each tire so know will know right away which one is low.
It only goes on when one of the tires is low on pressure.
Get/buy a tire gauge and fill tires to pressure shown on the drivers door jam.
You may have to drive a few miles for the monitors to reset.