Hello Guys, this thing is driving me nuts. I had the Innova reader show the codes P0054 (HO2S heater Resistance Bank 1, Sensor 2) and P0141 (O2 Heater Circuit Bank 1, Sensor 2) on my 05 1500 Avalanche. I was told to replace the second 02 Sensor on the driver side. Did it and cleared the code and made me very very happy. 2 weeks later came back on with the same codes. Can it be a bad AC Delco sensor or should I check something else? What did I do wrong? Please help.