I have had several problems with my TPMS. Just a note the TPMS should only go on when there is a 25 lbs pressure loss (approx. 8 lbs.), this can be 1 tire or several tires. When filling the tires have the car running or in the "ON" position. Fill and check all tires (the TPMS light will not go out unless all tires are at the proper pressure), shut the car off and then wait 2 - 3 minutes and restart the car the TPMS light should go out. Also if you have aftermarket wheels this may cause the TPMS light to trigger.