Customer Spent $1000...Now Runs WORSE?? (Sad Sonic -Part 1 - P0016)

The owner of this 2015 Chevy Sonic is beyond frustrated... He just spent over $1000 to fix a low power complaint with codes P0016 and P0420. After getting the car back from the shop with MANY new parts, it s STILL runs like garbage, and STILL setting the same two codes!! Sounds like it s time for an actual DIAGNOSIS :) IVAN S PICO WAVEFORMS: https://drive.google.com/drive/folders/12kVFLr3dGs9FHfYC8w1WS2fu7Gqb2BV8?usp=share_link THINKTOOL PROS: https://www.amazon.com/dp/B08XXWHQVJ?tag=onamzpineholl-20&linkCode=ssc&creativeASIN=B08XXWHQVJ&asc_item-id=amzn1.ideas.NHZL00NIDEPF Enjoy! Ivan