Do not driver the car if you face any problem in the car engine and you should check the car engine to know the problem. The car engine code is found if the car engine is tested by machine and collect the meaning of the car engine code. The car engine P2646 Code’s right meaning is useful for solving the car engine. By the symptoms, it is also easy to know the car engine problem. A service car engine soon lamp will be illumined since a code is kept in the PCM. Unevenness at sluggish, poor car engine presentation, and choppy hastening may also attend the service engine soon lamp.