midorigreen.

I have a 99 Honda Civic Dx, does anyone know what each of the four wires on the primary oxygen sensor are? Because I have a new oxygen sensor that has four wires coming out and are different colored than that of the wires coming out from the car. Thanks

From the car: 2 blacks, 1 white and 1 green
From the universal o2 sensor: 2 whites, 1 black and 1 gray

sleepinonacreeper

the two blacks are the heater, green is send, white is recieve

HATCHMO92

sorry i dont have a quick answer , but go to the H dealer ship look up the color for the car and then email . the company that makes the uni O2 sensor for it's colors?

midorigreen.

thanks i'll try that set-up

zdr262

hey i wanted to bring this up again but on the universal do you know which wires mean which grey,white(s),blk? also if both blacks r heaters then why does only one of them show 12v when the ign is on?