I've been using the default cessna to learn VOR, and soon to learn ILS landings, or at least trying to, but for some unknown reason the engine will shut off and I will get a few error lights. I don't set any failures to occur, that will probably be next on my learning list. The error lights i get are: L vac R, Oil Press, Volts. My question is why do I get these errors when I have no failures set up?