The B1484 Code defines the meaning of engine problem and this problem comes when the engine is diagnosis. You cannot fix the problem easily if you do not have all necessary content and machineries. It seems that the problem of the engine is related with body of engine and it is not necessary to change any part from the engine. The code meaning varies based on the model and manufacturer of the car. For solving the problem of the engine, it is also necessary to read the manual and with the help of professional, it is easy to solve the problem from the engine.