The car engine B2550 Code says the problem of the car engine and if the real meaning of the code is not known, then problem of the car engine remain undescriptive. According to the manufacturer name and model number of the car, the meaning of the code is necessary to use. You cannot get the real meaning from any different sources except the manufacturer information. The dictionary meaning of the code does not give the real meaning of the code. So, you must not use the code meaning for solving the car engine. Read the manual of the car engine for solving the car engine problem.