I have been having the same problem. Sometimes it just dies while I am driving. Once I pull over the car will turn over but not start.
I had it in for service and they replaced the cam sensor thinking that was it. The problem persisted.
I had another shop scan the car when it was in the phase of not starting and they pulled up 2 body codes and a communications code.
I am currently at the mercy of a dealership as a regular garage can not get any further with codes. They believe it is either an interrmittent module failure or possibly a problem with the chip in the key not being recognized.
Hope this helps or gives someone more insite into a solutution.