Engine Shut Off Without Warning problems of the 2010 Honda FIT

I was driving my 2010 Honda Fit sport automatic at 25mph on a city street, the engine suddenly shut off, all dashboard indicator lights and headlights went completely dark; I pulled the car over to the side of the road, noticing that power steering and brake assist were inactive so it was a challenge to get the car pulled over. The vehicle re-started on the first attempt and I was able to drive home. The dealership was unable to diagnose the problem and gave the vehicle back to me with no repair work done. 9 days later, the same thing happened. This time the vehicle was stopped at a red light and the engine shut off, dashboard went dark, and my ipod was frozen, which was connected through the usb port(it was not connected during the first stall). The engine did not start on the first or second attempt, but on the third. Once the vehicle started, I tried to shift from park to drive, but the shifter was stuck and would not shift. I put on my hazard lights, and spent about 60 seconds trying to shift from park to drive before it actually became unstuck and allowed me to shift. At that point I then drove away, I had been blocking traffic at a busy intersection, and then noticed that the ipod was frozen and would not respond to my restart attempts. I eventually figured out how to reset the ipod and it works fine now. The dealership was unable to diagnose the problem (again), and kept it at their shop for 9 days straight. They eventually told me I just had to take it back, so I did. No warning lights ever were displayed on both the incidents.