The engine P1797 Code has automobile dictionary meaning but that is not correct thing if you have the right meaning of the car engine code. Read the car engine manual to know the meaning of the car engine code. The right meaning of the engine code is more important than the automobile dictionary meaning. If you have the right meaning of the code, you do not need to find any other meaning of the code. It seems that the powertrain of the car engine is the main problem what is not difficult to solve he car engine. Get help from an automobile engineer to fix the issue.