P2098 and P2096 are both for after catalyst fuel trim too lean. One code is for bank 1 and one code is for bank 2. Running lean can cause issues long term so I would get a handle on the issue sooner than later as suggested.
Because it is both banks I doubt it is a bad sensor. Did this happen after you got some gas? If so, how many tanks of gas have you run since? It is possible you got some bad fuel. If you have run through several tanks the troubleshooting will need to get more in depth.
One thing is for sure... just resetting ht code is bad. Your car is telling you something... Don't ignore it.