It used to do it almost every time i drove it. (bought this piece of **** back in October). the last time sensor was replaced was back in January. It would happen here and there. Sometimes the SES would come on sometimes not. Then in February I replaced the IMG. It has only happened about 5-10 since then. So I dunno if that has anything to do with it or not. I could care less anymore. When it does it, I throw it in neutral and restart it! If thats the least of the problems I have with it then I consider myself lucky because I have had nothing but problems with this van. Counting down til I can trade it in!! Good luck!