The engine P0690 Code lets you know about the car engine’s problem and meaning of the code be found from various sources. Do not accept the meaning of the engine code if it is not from the trusted source like the automobile manufacturer’s given meaning. If you have no right meaning of the code. You will get new problems in the car engine. That is why, you should be careful and if you do not know about the car engine code and do not know how to solve the car engine, you should ask the automobile engineer for solving the car engine’s problem.