engine power reduced

Hello and please help guide me. I have a 2017 Buick LaCrosse Essence now with "Engine power is reduced." Light on. Took it to dealer that we have had all work done on and they don’t have an answer or code u less we pay almost 1k $ more to find out either 1 problem or 2nd problem would result...

2014 Buick Regal 2.0 turbo, 96k miles Hi all, I was hoping to get some feedback from anyone with knowledge on these 3 codes or turbo replacements in general. A few days ago my car started having issues and check engine light came on along with "reduced engine power" warning. I plugged my...