Know the correct meaning of the car engine P2664 Code for solving the car engine. The general meaning is not the right meaning for solving the car engine. You may use the general if the real meaning of the code is found. Technicians of the car or car engine report that the common reasons of this engine code are a faulty oil control valve, an open electrical circuit or connector connected to the oil control valve, or a faulty PCM. A low oil level or pressure condition could donate to this engine problem. The car engine should be fully ok and you can use general meaning for solving the car engine.