I had a check engine sensor light come on several times in my experience as well (I have had the car for 6 months) In all, a total of 3 sensors were replaced over a couple of months. these included a crankshaft and an intake sensor. The car could still be driven, but it was unsettling for some time. I guess better for a sensor than a mechanical part to go bad. It has been fine for over a month now.