I can't seem to figure out why my car isn't working well these days. every time I go to the store, work, or somewhere else, there's a caution light that comes on. I'm not sure whether it has an impact on that or anything because of how steep it is where I live. I've had this car for three years, but I'm not sure whether it has anything to do with it either. I occasionally leave it plugged in all night because it sometimes doesn't get completely charged. and i do get it checked to the service center. I'm lost can somebody help?