The engine P0201 Code comes for car engine problem and the problem of the car engine may be connected with several car engine problems. It becomes difficult to know about the engine problem without verification. The general meaning of the code is not directly linked with the car engine. You need to know the real meaning of the engine code. You will get several symptoms and you should check those symptoms. There are some causes for the car engine problem and those are Faulty cylinder 1 injector, Wiring harness that has an open or short, Poor electrical connection in the harness or connector and ECM that is failing or has failed.