Alright, here's the situation. I am replacing my O2 sensor. I bought one that is from DENSO. Its obviously a 4-wire sensor, but the wire colors are different. Its a splice into the old sensor deal.

The new sensor has 2 black, 1 blue, and 1 grey wires.

What are the colors of the stock sensor and how do they correspond to the DENSO sensor?

My bet is that noone will be able to answer by the time I wake up in the morning. GAME ON!!!

I'm not sure on what colors do what on your new sensor, but maybe google search it and see what you can find..did it come with a wiring diagram or anything? As far as the stock 02 goes, going off of memory here, so somone may want to verify:

White: o2 signal wire
White: heater power wire
Grey: heater ground wire
black: Ground wire

You will want to use a digital multimeter and find the correct white wire..One of the white wires should see power when the key is turned on, and when the car is started, one of the white wires will cycle voltage between .28- .88 or something around there..that wire is the o2 signal wire. Maybe this helps, maybe it doesnt :)

Here's our O2 harness:

White-Black = Signal
Black-Green = Signal Ground
Black-Red = Heater Power
Black = Heater Ground

If I'm not mistaken, the O2 is like this:

Blue = Signal
Gray = Signal Ground
Blacks = Heater Wires

Hook it up like this:

White-Black => Blue Wire
Black-Green => Gray Wire
Black-Red => Black Wire
Black => Black Wire

But, make sure your blue wire is the signal wire, most are. The paperwork that came with the O2 should say that it is. If not, put the O2 in, leave it unhooked, and test it with a volt meeter.

Originally posted by cougar694u
The paperwork that came with the O2 should say that

Originally posted by DarkOne

Originally posted by cougar694u The paperwork that came with the O2 should say that

Key word in that quote above...."should". The paperwork doesnt say a thing about what corresponds to what...hence me asking.

:P

Oh yeah, points to all of you for taking the challenge and helping me out. I will try what you all suggested.

Thanks
Jon

THANKS!! :thumbsup

What I meant by the paperwork was it *should* say which is the signal wire. I went through several days, and coountless hours toying and testing to finally figure it out.

Let me know how it works...