When the car engine is verified, then different code may show by the error code reader. The B1678 Code is relevant with that. It is compulsory to know all meaning of the code for solving the problem of the engine. If you do not take the car to auto repair center, you cannot solve the problem by yourself. Because, it is necessary to use different tools and machines. You need to know the meaning of the code from the auto dictionary. From the code, it is identified that Body of the engine has the main problem and it is very easy to solve the problem.