My car overheated today, while on the freeway. I'm not a car wiz... Is this gonna cost me a lot? I've had it for about 3 weeks, and this is the first time this has happened. I was on the freeway, going about 80, had ac on aswell, but turned it off(fortunately) before seeing the temp gauge was climbing! A friend told me it could be my radiator cap.... But let's consider what else it could be. How much would the fixes cost? Thanks everyone!