The diagnosis B1313 Code is set for the engine and it is necessary to get the meaning of the code for solving the problem of the engine. The same code has different meanings and that is why, it is necessary to know the model and manufacturer of the car. You have to know the definition of the code for solving the problem. If you do not have all expensive devices and components, you should give the task to professional for solving the problem. The problem may occur on the body of the engine and you do not expense huge amount for buying new parts.