Had the exact issue myself yesterday afternoon. Van stalled as pulled off the freeway at stop light. Would not restart for 3 attempts. Finally turned off ignition completely and opened door. Waited about 30 seconds while angry motorist raced by me on either side (had hazards on). Each attempt to restart I could hear a loud thumping noise behind the driver side near the sliding door. Sounded like someone was literally banging on the side of the car. Anyways on 4th attempt after opening drivers side door, I got the van to start. Had a message on the drivers dash that said, "Stop/Start Unavailable Service Stop/Start System". Van has 21,989 miles on it and dealer told me recall update HAD been done. Stopped at nearest gas station and after refueling anticipated error code would clear with a fresh restart, however as of this am I still have the error on my dash and plan to see the dealer tomorrow at 7am. I will not let my wife drive this vehicle which our children in it until this is resolved!