Q: check engine light O2 sensor already replaced same codes still popping up after replacing old O2 sensor

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I went to AutoZone after seeing a check engine light on and got a diagnostics check on my check engine light it said I have a faulty O2 sensor bank 1 sensor 2 to replace so I replaced it got my codes cleared even reset the codes by disconnecting the battery and drove over a hundred and fifty miles already I still have the check engine light on I went to AutoZone and got another diagnostic check and the same code is popping up still saying I need a new O2 sensor that bank 1 sensor 2 is faulty what should I do what else could be the problem if I have a brand new fitted O2 sensor in there already bank 1 Sensor 2 is the downstream O2 sensor on the Cadillac converter please someone help me what could be the problem

My car has 98000 miles.
My car has an automatic transmission.

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