Hi! My '03 Prius is sick...It will start normally, then the gas engine will cough and cut off, leaving only the electric engine running. The triangle and the engine light are on. Something similar happened a few months ago (on earth day, ironically) and the next day it started fine, so i never got it checked out. This time it has been 24 hours and it still isn't working so i'm guessing it isn't going to fix its self this time. It has 94,000 miles and has never had any major problems and still has the original battery. The battery could possibly be low because I drove from central texas to north carolina a little over a month ago, it was parked for 2 weeks and have been driving it fairly infrequently since (2-3 times a week), however the battery doesn't seem to be low, all the lights and the radio are working. Could a battery issue cause the gas engine to fail? Also, this happened the next time i started it after getting gas, could it be caused by bad gas? It almost seems like a problem with the fuel injector but I thought that Prius' didn't have a traditional fuel injector. Any one have similar experiences or ideas? I would at least like to have a vague idea of what is going on before i take it to the dealer.