The engine B2406 Code is related with the car engine and it is important to fix the car engine area. When the engine code reader fails to check the engine area, then the code appears on the engine code reader. You should get the car engine fixed, you should take the car to the professional automobile engineer. The automobile dictionary meaning of the code is general and do not try to fix the car engine with the meaning. An automobile engineer needs find the real meaning of the code and he also needs to use some tools for solving the car engine problem.