The powertrain is located in the car engine and letter P means powertrain and this engine P0689 Code lets us know about the problem. If you do not know the way of solving the car engine, you should not try to solve the car engine problem although you have all necessary tool. Do not rely on the automobile dictionary meaning of the code what may not be suitable for solving your car engine’s problem. Your car manufacturer has a right meaning of the code based on your car. You should use that meaning only for solving the car engine. Otherwise, you will face terrible problem in the car engine.