The P20B6 Code is connected with the automobile engine and for the problem of that car engine, the code P20B6 comes. It is important to fix the car engine and after fixing the engine the code will not be visible again. The engine code reader identifies the problem area from the engine when it cannot check the area. So, the code comes for that area. The general meaning of the code is not necessary to use for solving the car engine problem. Do not drive the car with the problem. You must face different problems if you follow general meaning of the code.