Anybody familiear with these 2 codes that frequently are popping up? My Duremetric displayed these codes.
I have cleared them before, but they return intermittently.... usually only throws the code during idleing for prolonged time (~3-5 min) and when engine is warmed up.
Absolutely no misfires or problems noticed with driving. O2 sensors are only about 1-1/2 years old. OEM Cats do have about 175K miles on them.
Fault codes seem contradictory to each other? one says too rich.. while other says... too lean. Before I think about even replacing Cats... I need to know if thats the issue?
any suggestions? Thanks all!

P 2198 O2 Sensor Signal Biased / Stuck Rich Bank 2 sensor 1

P 2272 Oxygen Sensor Signal behind Cat. Converter, Bank 2 too lean

 

This is interesting that they contradict. I would start by watching ltft and stft fuel trims on bank 2 to see if it really is running rich ( I suspect this is your real problem) the after cat fault is just likely an effect of front O2 sensor reading so rich.