Thread: Making O2 sensor extension for headers - which wire goes where?

I must be in a fog right now, I cut a brand new O2 sensor to extend the wires & forgot the mark the wires vs the plug. Wouldn't be a problem but there r 2 white wires. Anyone got a picture wires from the sensor to the plug?

Just need to know where the white wires go. Anyone got a new/used one in front of them? This is the only thing holding me up from starting this pig finally.

Doesn't one of them have a black mark on it?

No, 2 whites have no marks.

Mine are brown, tan, pink, and black.

Can you snap a pic of those colors going into the plug & those colors going into the sensor? That will reference everything for me,

yeah just a min

one is purple

Do you have a picture of how those colors go into the actual sensor in the exhaust? That is where I am lost.

I'd have to crawl under my car i'll try to get you some later i'm getting ready to take the kids to the pool it's the last day lol

I have a pic of where the sensor is in the exhaust but not the whole wire i'd have to pull the extension off the car.

Yeah with the colours not matching up, I can't tell. All the pics on the internet I can't tell either because of the wrap. I wonder if it matters lol?
Thanks for the really quick responses.

two are power, a 12 and 5v i think and one is ground and the other is output. you have two circuits in there... a heater and the sensor

You need a new sensor anyhow. Trying to solder the O2 wiring from teh sensor to pigtail is usually an effort in futility. I'd suggest looking up Blueguy's post about the sensor with a long pigtail to keep you from buying an extension or extending the wires on the car's harness.

you dont want to extend your o2 harness with solder and wire, buy a extension harness for 15 bucks at zzp. your jacking with the resistance values of the wires, which i turn changes voltage readings and giving you false and inaccurate readings

I purchased a new sensor from ZZP it has 4 wires (black, grey, white, white) - I cut the sensor wires at the midpoint to make the O2 extension harness. I added about 15 inches worth of wire to avoid being anywhere near the headers. The problem is that I didn't mark the white wires. So I have my plug end with those 4 wires & I have the actual sensor end with those 4 wires. The grey & black obviously connect but I don't know which white on the plug end goes with which white on the sensor end?

So with the header install I needed to extend the harness. I purchased a brand new O2 sensor from ZZP & extended harness myself.

However, extending the harness came with some problems http://www.grandprixforums.net/makin...ere-67540.html

Now I am getting code 1133, I ended up guessing which of the 2 unmarked white wires goes where - guess that failed or the extension is too long & throwing out bad readings? Anyone have a picture of an O2 sensor showing exactly what wires from the plub end go into what position on the sensor end?

I would hate to throw away a sensor with 50 miles on it.

One issue..one thread. You've been merged!

thanks!

FWIW I've tried extending a sensor before and those wires just don't like to solder. I'd take your old sensor and extend the wiring harness side..nto the sensor wires. then ... do them one at a time instead of cutting all at one shot.