Check engine light came on for bank 2 censor 2. Erased code after i replaced o2 censor. Ran fine. Check engine light came back on. Replaced o2 again. Ran fine. Code back on

What is your question?

O2 censor bank 2 censor 2. Replaced twiced. Code still comes back. Runs perfect until light comes on

What makes this problem better or worse?

After clearing code runs perfect for a day or two then code reappears

How long has your 1996 Chevrolet K1500 had this problem?

A month