My tire sensor said to add air and its 7 psi I checked it and the pressure is actually 42. the other 3 tires are fine. I turned the car off for an hour and it was fine but than popped up again. I cant figure this out please help.
Matteosr1

 

Run your tire at 45 psi.

 

The TPS sensor in that wheel is probably getting weak and it's time for a new one.

 

can i change it my self and where is it?
Thank you for the info. Matt

 

It's built onto the valve stem. I would stop by a tire store and ask them how much to replace it.

 

When the battery in your tpms sensor starts to go bad it will start giving false reading. just have it replaced.