Is it a hybrid? If it is, it is probably just acting up (a Hybrid automatically shuts off at stop lights, but should start right back up once you try driving) , or maybe it is low on gas. Something might be wrong with your car, so you might want to go find someone with more experience, like a car dealer or engineer. Also, as I already mentioned, your car might be extremely low on gas. The best thing to do is probably just to go to an engineer, car dealer, or someone who knows a lot about cars, and knows about your model of car as well as all the parts. Maybe they can fix it.
Sorry, I wish I knew more about cars so I could be more of a help!
Answered May 24, 2010
Edited May 24, 2010