Opinions are like belly buttons, everyone has one.
What is wrong with checking for DTCs? We have this option but few seem to use it.
Mileage on car? With limited and confusing info it is impossible to say what could be wrong.
The OP mentions someone’s post, why not show it?
Air could leak at the donut and the TB O-ring.
We have a lot of threads on what DTC reader to buy but nobody uses it when they get one.