Can you splice a oxygen sensor wire ?
Thread Starter
Member
Joined: Oct 2005
Posts: 205
Likes: 0
From: Richmond, VA
Car: '06 Nissan Sentra SE-R Spec V
Engine: Big block 2.5L
Transmission: 6 Speed
Can you splice a oxygen sensor wire ?
Someone spliced together two different wires on my oxygen sensor and then put black tape around it. I heard from someone that you cannot splice together a wire on the oxygen sensor because it won't work right. One wire is green, but the last few inches where it goes into the pipe it's black.
Last edited by Doom Sayer; Feb 14, 2006 at 05:29 PM.
Member
iTrader: (1)
Joined: Feb 2005
Posts: 471
Likes: 0
From: Frankfort, KY
Car: 81 Corvette
Engine: 355, ported vortec heads
Transmission: 700r4
Is it one wire spliced into the black wire? Ex. black - tape - green.
Or is it a green wire spliced to the black wire, like for something else to get a reading?
If it the case of the first I don't see a problem with that. There would have to be a harness there to allow a clean replacement.
Or is it a green wire spliced to the black wire, like for something else to get a reading?
If it the case of the first I don't see a problem with that. There would have to be a harness there to allow a clean replacement.
Last edited by vrtc350; Feb 15, 2006 at 02:33 PM.
Thread Starter
Member
Joined: Oct 2005
Posts: 205
Likes: 0
From: Richmond, VA
Car: '06 Nissan Sentra SE-R Spec V
Engine: Big block 2.5L
Transmission: 6 Speed
By looking at it, it looks like the original wire(green) wasn't long enough, so they took some other kind of wire(black) and spliced it so it would reach to the pipe... Or like if they got it off another car and just cut it wires in half and spliced them together instead of just buying a new sensor.
Member
iTrader: (1)
Joined: Dec 2004
Posts: 239
Likes: 0
From: FLORIDA
Car: 86 CAMARO
Engine: 92-350 +.030
Transmission: 86-th400
Axle/Gears: 3.73
is there still a disconnect terminal on sensor wire ? sometimes they break and people splice. you can splice just use high temp wire if possible and do a good job of it. soldier and heat shrink or crimp terminal disconnects and heat shrink tubing. stay away from tape because it melts off and could short out.
Trending Topics
Member
Joined: Apr 2004
Posts: 262
Likes: 2
From: Abilene, TX
Car: 1989 GTA
Engine: 5.7 TPI
Transmission: A4
Axle/Gears: 3.23
Unless you have 4 gage wire or fiber optic wires running to your O2 (you don't) just twist them together and tape it. Solder them if it comes apart again.
Supreme Member
Joined: Aug 2001
Posts: 5,388
Likes: 2
From: Caldwell,ID
Car: 2005 BMW 545i
Engine: 4.4L N62B44
Transmission: 6spd auto
Axle/Gears: Rotating
on my mazda the O2 doesn't have any kind of harness or anything like that. just a wire going from the ecu down the o2. I have twisted them together using electrical tape. I have soldered them and electrical taped them. hell I have superglued them. used a bolt with a hole on them. every time I was able to get a good consistant reading from my O2 as read from backprobing my ECU. so donno whats up
Moderator
Joined: Jan 2000
Posts: 19,668
Likes: 314
IIRC, some one-wire zirconia sensors used a hollow lead that admitted atmospheric air to one end of the element as a reference junction. Soldering that would be a problem. I don't know if that is still the case.
Junior Member
Joined: May 2004
Posts: 65
Likes: 0
From: Tyler, TX
Car: 92 Heritage T-Top
Engine: 350
Transmission: 5-Speed
Away from the original question, but what about tapping a wire into your O2 sensor for something else to obtain a reading? Like an A/F ration gauge? Would that cause an improper reading from the sensor? If I was guessing it would cause both readings, ECM and Gauge, to be incorrect. Yay or nay?
Moderator
Joined: Jan 2000
Posts: 19,668
Likes: 314
Originally posted by rx7speed
didn't know that. do you have any pictures or reference to one ofthem?
didn't know that. do you have any pictures or reference to one ofthem?
Moderator
Joined: Jan 2000
Posts: 19,668
Likes: 314
Well, whaddya know? Looks like they are back to doing it again:
The whole article is here: http://www.aa1car.com/library/o2sensor.htm
"The outside of the bulb is exposed to the hot gases in the exhaust while the inside of the bulb is vented internally through the sensor body to the outside atmosphere. Older style oxygen sensors actually have a small hole in the body shell so air can enter the sensor, but newer style O2 sensors "breathe" through their wire connectors and have no vent hole. It’s hard to believe, but the tiny amount of space between the insulation and wire provides enough room for air to seep into the sensor (for this reason, grease should never be used on O2 sensor connectors because it can block the flow of air). Venting the sensor through the wires rather than with a hole in the body reduces the risk of dirt or water contamination that could foul the sensor from the inside and cause it to fail.
Moderator
Joined: Jan 2000
Posts: 19,668
Likes: 314
What? Do you think I just make this stuff up? 
Another one from http://www.melsauto.com/
http://www.autotap.com/articles/Unde...n_Sensors.pdf.
There a several others. Google "oxygen sensor" and "no vent" and you'll get over a hundred hits.
Another one from http://www.melsauto.com/
...Newer-style O2 sensors "breathe" through their wire connectors and have no vent hole... venting the sensor through the wires rather than with a hole in the body reduces the risk of dirt or water contamination that could foul the sensor from the inside and cause it to fail. ...
There a several others. Google "oxygen sensor" and "no vent" and you'll get over a hundred hits.
Supreme Member
Joined: Apr 2000
Posts: 3,187
Likes: 0
From: E.B.F. TN
Car: Tree Huggers
Engine: Do Not
Transmission: Appreciate Me.
Originally posted by Vader
What? Do you think I just make this stuff up?
...
What? Do you think I just make this stuff up?
...
Thread
Thread Starter
Forum
Replies
Last Post
