Hi! I have a 2012 v6 mustang base. The Advancetrac light its on again. It was in the tech warranty two weeks ago for the same thing. They first told me that the problem was with the tires because they are not the same size.( I got 18"9.5 rear & 18"8.5 front). The car had the tires for over a year. Then the tech told me that they need to reprogram the computer and with that everything was getting fixed. The only upgrades the car have is the wheels and the eibach pro springs. Does anyone know how can I fix the problem without taking the car to the Ford Tech warranty?