in august this started happening the tire pressure sensor fault light and it goes on everyday, so annoying. i went to the dealership and they scanned it and said the cell phone charger might be interfering with the electrical, however most of the time it comes one when i don't even use the charger. then another problem was a noise in the back going over bumps and uneven roads. so the problem was the e brake cables going through the loop under the body of the car, and the dealer installed a kit on it, but the noise is still there a little bit, and just putting some heavy grease on it and it takes it away.