That usually indicates a severe condition with your car.
Plug in a OBD2 in it, pull the codes and go from there.
If you don't have an OBD2 Go to AutoZone, they can pull the codes and give you some sort of "possible" explication of what's going on. No singular code tells you what needs to be fixed.
If you take it to a dealership or mechanic you will be charged a minimum of $100 and up just to check it and nothing else.