Limp Mode is an understatement! It happened to me once, luckily only 2 miles from home and I was able to get it back home s-l-o-w-l-y. I called the service department the next day, they got me in that day and I drove there without incident. They found a faulty Crank Angle Sensor Code in memory and ordered a replacement. I drove home and returned next week when the part was in without any trouble. The installation and computer checks were complete in 15 minutes. Only one bolt holding sensor. It is visible next to the transmission skid plate and easy to get to.