This P0787 Code is an engine code and you will get the code on the engine code reader. The engine code is found by the testing the car engine. The engine code reader shows the code and you or the automobile engineer can find the real meaning of the code. Fix the car engine by an automobile engineer for solving the car. You must not allow immature person for solving the car engine. In the car engine, the powertrain is faulty. The powertrain problem is usually general problem and this problem can be fixed easily. Do not drive the car with the minor or major problem.