This may seem obvious to some of you but here goes. Make sure whoever rotates your tires goes through the process of relearning the sensors. I had mine rotated at the dealer and specifically asked if the sensers were fixed and was told they were. A few days later I got a low pressure warning saying my front left was at 28 LBS. I took it to a pump and discovered with my guage that the pressure was at 35. I thought, great, my sensor is bad. I hoped starting the car the next morning the computer would reset and all would be good. I turned on the car and it said front left was at 9 LBS! Only after arriving at my location and exiting the car did I realize that my left rear was flat, not the front left as the DIC told me. Moral of the story is to be sure to check your other tires if you get a low pressure reading and your tire looks fine.