I just got the car and it has 1800 miles on it. I noticed 3 days ago that when I drive on the Freeway about 80-90 MPH the left rear tire's PSI drops from 33 to 26 and sometimes to 21 psi when I got up to 100MPH. Of course the Check Tire Pressure warning light comes on. When I slow down to 60MPH it goes back to normal. Is there a problem with these TPMS sensors that anyone experienced? I wanted to get some imput before I take it back to the dealership( which is 45 min away. thanks



Anthony