I have had the same problem from time to time. The ETC warming light will come on and the van will decrease power momentarily , I usually pull over, turn the engine off and then back on. That light goes out and then the check engine light will come on and stay on. After several starts and stops the check engine light goes out. Dealer has checked it and says it is ok, seems to be fine. I have a 2014 High top diesel. I have over 30,000 miles and other than a few things like this I am happy with my PM diesel. Next time I am by the dealer I am going to get them to pull the code again and note it.