The cruise control in my '04 Corolla has started not working occasionally. When it's not working, I will set it at a certain speed, it holds the speed for a few seconds, then the car slows down. Whether it works or not seems to be tied in with the ignition somehow, as when it's not working, the next time I turn of the ignition, and then turn it back on, it works again. I've never had to have a CC repaired on a vehicle before. Do any of you know if this is an expensive repair?