2006 Hyundai Tiburon -O2 code

Hyundai Tiburon 2006 GT V6 5-speed has an 02 sensor code. When it hits 2000 rpm it shakes and is slow to get to speed through the gears. Feels like it isn’t aspirating enough but gets 33 mpg which is higher than the 26 mpg it should be getting - not complaining about that. When it gets warmed up it runs better and you can get higher rpms (up to 3k rpms) but still doesn’t have the power it should have. Any ideas?

Yes, I suggest you have all the computer codes read and post them here in the form P1234. An 02 sensor code tells us nothing and if there are more, that will help us help you.

You can get the codes read for free at most local auto parts stores.