I have brought the van to the dealership 3 times, and each time they have been unable to find 'anything' wrong with it. Each time it stalls the ESP light comes on on the dash and the RPM drops to 0. I can't hear the engine die though. My steering wheel will become stiff and difficult to maneuver to the side of the road. It happens if I'm going 15mph or 60. I don't care if if costs a grand to fix, I just want to know what to do!