Had flex pipe replacedlast week, now fuel mileage is dropping and engine misses at around 4500 rpm when accelerating @ about 65

 

Year, model and engine size would help. Info like mileage, how long you've owned it, etc. would be useful too.
And, Do you mean P0072 ? Or P0172 ? Your post is missing a numerical.

(putting this in the Fuel Economy thread is the wrong place )

 

I am guessing you mean P0172? Any other codes?

P0172 means too rich A/F mixture.

Probably have a bad injector or fuel pump or MAF sensor or they left an exhaust or vacuum leak.

https://www.obd-codes.com/p0172

 

Sorry haven't been on sight for a while didn't mean to offend just looking for help from other hhr owners o thought under fuel economy might be the place since mine is crashing. Owned car for over 10 years, have put over 150k myself, LT Spring Edition

 

As the link in post #3 shows clean the MAF sensor, I’d also clean the throttle body

 

Not offended. Just trying to get some facts and info so we can help you with your problem.
Was asking for some confirmation on the CEL code since the one you originally posted was not an actual OBD code number.
Would hate to send you on a wild goose chase because you posted up a bad CEL number.

 

At least he came back to this thread, seems to have a history of abandonment.

Maybe it is a problem with scrolling?