The engine P0159 Code is related with the engine and it is found in the car engine. The code tells about the car engine problem. Do not use Automobile meaning of the code or any other meaning of the code what is not related with your car. The car engine can be solved by the professional automobile engineer. Do not drive the car with the car engine problem. You should fix the car engine before driving the car engine. Once the car is ok, then take it for a test drive. If you find any problem in the car engine, let the engineer know about the car engine problem.