For years the check advance trac system light would bing. I would take it into the dealership and they never found anything. So...I learned to ignore it and would just turn it off on the dashboard when it happened. Then, about 6 months ago, I had just turned a corner and was going 20-25 mph. when my advance trac stuttered brakes engaged and slammed my car to a dead stop. If someone had been behind me they would have rear ended me. In 5 minutes I would have been on the interstate and a move like that would have flipped my car. I had NO control over the car and even left a patch where the car stopped. I was attempting to turn in a driveway to turn around and it happened again. We took it to the dealership and $3000 later they said they couldn't find anything wrong with it. I was to bring it in if the warning came on again, keep the car running, and they would hook it up to their computer to see what was wrong. I did that and they supposedly fixed it again, (this time for no extra charge). A month or so later it happened again. I was finally told that they didn't know what to do. Two weeks ago the van stuttered, brakes engaged again 4 times in the matter of 2 miles. I am afraid to drive this car and will be getting a new one...not a Ford because they didn't know how to fix this one. Adding insult to injury, my daughter informed me that her car, not a Ford, had been recalled for faulty brake sensors. The stutter brakes would engage stopping the car. The sensors were replaced at no charge and all was well. I was told the sensors were $1000 each plus labor...probably why Ford didn't want to deal with it.