Abarth 124 spider high RPMs

Hello there guys I’m new to this form but I need your guys help I recently bought a 2018 Fiat Abarth 124 Spider Automatic with 12k miles on Copart The car was crash from front but did not touch any engine components so after seven months I fixed it up And saw there was a check engine but I ignored it for now and and did a test drive during my test drive I stepped on the gas and noticed that the rpms where going very high it was at 5,000 rpms and wouldn’t switch gears so I let go of the accelerator and check the codes and This is what I got

Engine codes
P0016
U0401

I did change the cam sensor and the code was still persistent still. the car is stock I think since I’m not the first owner I really don’t know if they install the tune or not but I wanted to know if it’s normal for the car to go high rpms and not switch gears when you step on it I would appreciate your guys help