You should find the right meaning of this car engine P2678 Code what is found after checking the car engine. The meaning of the code is very useful to understand the problem of the car engine. If you do not know how to find or solve the car engine, then you must rely on an automobile engineer who knows well how to check the car engine and fix the car engine issues. All problems in the car engine should be fully fixed or ok. The automobile dictionary meaning of the code may be used for solving the car engine instead of the real meaning if the real meaning is not found.