You must not use the car engine if the car engine is problematic. From the engine P0830 Code, you will know detail about the car engine problem. You should fix the car engine properly and if you do not know the right meaning of the code, you cannot solve the problem. You will get some other meanings of the code what are from different sources and right meaning of the code is found from the car manufacturer of your problematic car. Once the car engine is ok, then you take it for a test drive. If the problem is nt solved, take the car back to repair center.