The engine B2540 Code is linked with the car engine and it indicates the problem of the body of the engine. Do not use false information like automobile dictionary meaning for solving the car engine. The dictionary meaning is a common meaning of code and you cannot solve the problem if you follow the dictionary meaning. The manufacturer of the car has a specific meaning of the code and an automobile engineer needs to get that meaning for solving the car engine problem. You need to use the expensive materials for solving the car engine problem. If you know how to solve, you can try.