Basically what the title says. Just need to know what color wires from the O2 sensor go to the obdb engine harness. thanks in advance.

 

?

 

you cut the wires off the engine harness....instead of the old o2 sensor??? really smrt

what colors do you have?
2 blck
1 wht
1 ___

 

Return it and get an O2 sensor that already has a connector attached...like a Denso Direc-Fit.

 

returning it isnt an option. i have a plug that ill use, so im not really hardwiring it, but i still need to know the colors from the harness please.

i think the o2 has black, white and 2 grays

 

sounds like a bosch unit to me...
be ready for that pos to die within a month

cant really tell you what colors do what, but the 2 greys probably equate to blacks, white is green and black is blue
(or something that ridiculous)
You didnt get a sheet with it saying which wire does what?

 

bosch is a mistake, i would take a used oem out of a junk yard before i would use bosch.

 

I couldn't tell you what the wire colors are for on the O2 sensor you have...considering you didn't include who made it anywhere in this thread. So that'll be your job.

On a stock O2 though, the two blacks are for the heater, the green is signal ground and white is signal.

EDIT: Oh...is it a Bosch? I'll look for your 'Code 1, 41, or 43' thread here shortly. Seriously, universal sensors, let alone Bosch's, are complete junk for Honda's. They respond waaay to slow.

 

seriously, why are arent the black wires grounds
Is it a loop heater (like a light bulb)?

 

Yes sir. It's there to get the O2 up to 600*F so that it starts outputting a signal. If you ever get a Code 41 (or 65 for the rear sensor), unplug the O2 and measure between the two blacks: 15-40 ohms is spec.

 

learned 2 things today

 

so I checked it today and I have a black, a gray, and 2 whites.

Pretty sure the 2 whites are the heater wires, and the black/gray are the signal wires.

Any idea which of these go to which color on the harness side? And how do I tell which white wire is positive, and which is negative?


thanks a TON guys.

 

On an OEM plug:

Green is signal ground
White is signal

The two blacks are for the heater. The black at Pin 3 goes to a switched voltage source and the one at Pin 4 goes to the ECU heater control.

You should get a Helms.

 

I have one downloaded on my computer, but when I went through the 2064 pages, I dont remember seeing exactly which wires are for what.

Ill check again, thanks.