The engine P0984 Code is a terrible code and it is meaningful what you can use for solving the car engine problem. Do not use the false meaning of the code. You cannot identify the real problem from the car engine. Due to use of the wrong meaning of the code, you may face terrible problem in the car engine. The automobile dictionary meaning of the code is not wrong meaning and you can get general information from this meaning. When you know the right meaning, you must not use this meaning. When the car engine fixed, you should check it by a test drive.