Yea, take it to the dealer - that will fix everything.... (See my sigline.)

Ok, search "Mystery No Start", the engine control relay output from the RCM, if it fails, means the engine quits running and the starter won't engage. Sounds like you have what is about the most common "my car left me stranded" complaint on this forum.

And there are no codes to read when this happens, it is what the I.T. people would call a "layer 1" problem.