The major multi movement process turned off the conflicting pairs of cylinders, letting the engine to have 3 different outlines and movements. The engine P1866 code had an sumptuous diagnostics process, including viewing the car engine error codes on the air conditioning display. However, the structure was faulty, misunderstood by clienteles, and a rash of random disappointments led to the technology being rapidly retired. The weakly running signs are reliable with a MAP sensor fault. If you do not understand about the problem and you have no knowledge of solving the car engine, you must take the car to a repair center.