I have both these codes P2096 & p2098, does anyone know what could be causing the issues?

I just swapped my engine with another due to knocking, the codes above where present before and after engine swap!
Thanks

 

Look at fuel trims but if they're OK then the cats look suspect.

 

Thanks i already replaced my cats and and o2 sensors earlier this year.

 

That leaves the rest of my post.

 

Thanks everyone i have a transmission fluid leak after engine replacement the mechanic is trying to stick me for $600 extra to change transmission pump seal. However I think its his fault as he may have damaged the torque converter seal, not to mention my house just burned down. Whats next? gf.me/u/fj4pk3