2008 RR SC 4.2l

I have been getting the an o2 error code (P2098) for a couple of weeks now and I replaced both up and down steam sensors. then a few days later the check engine light came back on and now shows P0151, P0131, P0031, P0051 errors. I had the other two sensors replaced but still getting the same codes popping up for all four sensors. could some one please let me know what my next steps are?
I have checked fuses, cleaned MAS, EGR and PVC. I couldn't find any vacuum leaks any where and it runs fine so I don't think there is a fuel problem.
I don't know if if I need to get different sensors? or other options to try before buying new sensors for existing new sensors installed currently.
thanks for the help figuring out this dilemma.

 

Those codes would indicate that there is possibly a poor connection in the wiring to the sensors. You should carefully check the wiring and connections for damage or dirt in the plugs. Make sure the looms are intact and have not been damaged by contact with any hot surfaces such as the exhaust. As they're new sensors (and presumably the correct ones) they're unlikely to be at fault, though that isn't impossible.

It is likely that your original fault code was nothing at all to do with the O2 sensors, check out this link https://www.obd-codes.com/p2098.

Do you still have the old sensors, maybe you could refit them and see if they perform better, or if you get P2098 again check out the other probable causes and don't ignore dirty injectors as a primary factor.