OK, there is not a in line fuse. The O2 sensor puts out very low voltage and an fuse would not work. However you bought a O2 sensor and you do not know the part number that you bought? I am trying to figure out if they sold you the wrong O2 sensor. They should have given you a print out of the P code that your computer said was the problem. You also lost the sheet? I tend to not trust the highschool drop outs that AutoZone likes to hire.Sorry, dont have pin no. autozone checked and said o2 senser on manafold after changing it again. It has stayed on for 500mi now. Is there a in-line fuse? Bad senser?
Your old one is generation 1 and the new one should be generation 2. The new one has a faster heat up and overall reaction times are faster as well. (There is also a generation 3 but iirc it will not talk to our PCM's correctly. The voltage runs from 0-12vdc +-)this is a pic of my old Sensor, it is completely different from the new one, any idea?