DTC U0129, automatic transmission not working properly

Hello dear friends, after a couple months saving money finally bought a scanner MaxiCOMmk808. I scan my car and found some DTC and I would like to help me to repair my car. I want to show you DTC and follow your instructions step by step. I can’t move the car because it's hard to operate the gear shift and it sounds like click. it’s difficult look on the video but when put the gear shift lever P to D or R the car moves very abruptly. Morning. I was thinking and I have a idea. What do you think if we start the troubleshooting with the DTC U0129. Regards from Panam City.