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I have a 2000 Tundra 2dr. with the 3.4L motor, Auto trans... Somebody cut off my cattlytic converter and decided to cut my wire harness for 02 sensor also.. I welded a new cat on and got a new o2 from the parts store. none of my local parts stores or junk yards had the pigtail for my sensor so i had to buy a universal one.. I am not sure what wires to splice into each other.. the sensor has 4 wires two white, one grey, and one black. (white-heater wires) (black-hot wire) (grey-Ground)..... Does anybody know which wires to splice together or have any recomendations? THANKS!!!!!
 
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