The P1398 engine code seems a kind of powertrain problem and engine code is important for explanation. The engine P1398 Code is found in the car engine and meaning of the code lets you know of the car engine problem. If you do not fix the car engine by the right meaning of the code, then it may make more terrible problem in the car engine. The main multi-displacement system turned off the conflicting pairs of cylinders, allowing the engine to have 3 different outlines and movements. However, the car engine problem can be very serious but the problem can be fixed very easily by an expert automobile engineer.