The B1685 Code has a meaning and the meaning is based on the model and manufacturer of the car. The same engine code is set for different car engines for different meaning. So, it is necessary to get all meanings of the code. If name of the manufacturer and model number are known, then it is possible to get the meaning of the code. Auto repair related dictionary also describes the meaning of the code. It is also necessary to know the meaning of the code from the auto repair dictionary. When the car is checked and problem is solved, then test drive is important.