The engine P0311 Code lets you know about the car engine problem and it tells about the location of the car engine problem. You should study the meaning of the code for solving the car engine. If you do not know the process of solving the car engine, you must not try to fix the car engine. Take the car to automobile engineer for solving the car engine. If you want to know the meaning of the code, then you can find the information from the automobile meaning but it is not helpful for solving the car engine. Due to use wrong meaning of the code, the engine may get new problems.