It is necessary to fix the car engine by the right meaning of the engine P0664 Code. The car engine can be fixed in proper way. The engine method, in conjunction with the engine control module (ECM) or the powertrain control module (PCM), stimulates the trouble P0664 code solenoid valve to control oil pressure to the engine instrument that is installed in the valve system to change valve timing between High and low. If the engine solenoid controller has an open or short circuit, a DTC is stored. If you cannot fix the car engine, you must take help from the automobile engineer to solve the problem.