Replaced upper bank1 #1 heated o2 censor cleared code and light came back on why

Either it was misdiagnosed or the wrong sensor was replaced, depending on the code you had. Best advise to you is to take it to a qualified repair facility and have it diagnosed by a professional. Throwing parts at it will cost more in the long run. Feel free to give us a call at Advanced Auto Clinic in Delavan. 262-728-2944. We will diagnose it and fix it right the first time for a reasonable cost.

Which code do you have before?