Generic OBD readers only tell you half the story. Modern vehicles run on a...

https://www.inter-bookmarks.win/modern-cars-are-essentially-rolling-networks-you-can-t-fix-them-with-a-basic

Generic OBD readers only tell you half the story. Modern vehicles run on a complex network of ECUs that manage everything from engine timing to cabin comfort. If you rely on basic codes, you are just guessing