splicing 02 Sensors?
Thread Starter
Race Director
Joined: Feb 2013
Posts: 19,864
Likes: 146
From: South East TN
splicing 02 Sensors?
I was wondering if I could splice new 02 sensors into my existing wiring?
This weekend i was going to change 02 sensors, when I got under the car I noticed the 02 sensor connectors had gotten too close to the headers at some point in time and are somewhat melted. This must have happened during thge previous owners time. The sensors wiring is zip tied up out of the way now, but the damage is still there. I'm afraid if Try to seperate the connectors they'll just break. I've had the car for about a year and recently started getting a PO135 code. So I was wanting to clip the wires at the 02 sensor and then splice those wires into the new 02 sensors. Is there any reason this wouldn't work?
It's an 04 Z06, headers, cat delete, only two 02 sensors on the car. I would like to repair the wiring correctly at some later time, maybe when I have the headers off. But there isn't any room with the headers installed.
So will this work?
This weekend i was going to change 02 sensors, when I got under the car I noticed the 02 sensor connectors had gotten too close to the headers at some point in time and are somewhat melted. This must have happened during thge previous owners time. The sensors wiring is zip tied up out of the way now, but the damage is still there. I'm afraid if Try to seperate the connectors they'll just break. I've had the car for about a year and recently started getting a PO135 code. So I was wanting to clip the wires at the 02 sensor and then splice those wires into the new 02 sensors. Is there any reason this wouldn't work?
It's an 04 Z06, headers, cat delete, only two 02 sensors on the car. I would like to repair the wiring correctly at some later time, maybe when I have the headers off. But there isn't any room with the headers installed.
So will this work?
Le Mans Master
Joined: Oct 2010
Posts: 7,373
Likes: 1,128
From: cold & windy
it's doable. you just gotta be thorough, accurately label each wire/pin, and do good solders.
when i put catless LTs on my truck, i swapped the front truck O2s to corvette rears (which have different connectors & different pins). once you figure out which wires go to which spots, just pull back the heat jacket, make staggered cuts (to keep the spliced area from getting too thick for the jacket to slide back over), and do your reconnecting.
when i put catless LTs on my truck, i swapped the front truck O2s to corvette rears (which have different connectors & different pins). once you figure out which wires go to which spots, just pull back the heat jacket, make staggered cuts (to keep the spliced area from getting too thick for the jacket to slide back over), and do your reconnecting.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Well,,, If it were me,,, I would contact www.gmpartshouse.com and ask Gene or Patrick for a new harness pigtail connector and splice that on the the harness.
That way, you can plug the sensors back in like they were designed
The service manual says NOT to splice the sensors as the wires act as a path for fresh air.
My 2 cents..
BC
That way, you can plug the sensors back in like they were designed
The service manual says NOT to splice the sensors as the wires act as a path for fresh air.
My 2 cents..
BC
Le Mans Master
Joined: Oct 2010
Posts: 7,373
Likes: 1,128
From: cold & windy
so OP, are you saying that if you follow the wiring from the sensor, there's: the O2 itself, then the wires coming off of it, then the sensor connector, then the chassis harness connector, and then the melted part?
Burning Brakes
Joined: Aug 2011
Posts: 1,071
Likes: 14
From: Odessa TX
Well,,, If it were me,,, I would contact www.gmpartshouse.com and ask Gene or Patrick for a new harness pigtail connector and splice that on the the harness.
That way, you can plug the sensors back in like they were designed
The service manual says NOT to splice the sensors as the wires act as a path for fresh air.
My 2 cents..
BC
That way, you can plug the sensors back in like they were designed
The service manual says NOT to splice the sensors as the wires act as a path for fresh air.
My 2 cents..
BC
FWIW, I've had other cars where the "generic" O2 sensors are significantly cheaper than the OEM specific, due to uncommon connectors, and the install for those are to splice the wires. All equip comes included.
Thread Starter
Race Director
Joined: Feb 2013
Posts: 19,864
Likes: 146
From: South East TN
so OP, are you saying that if you follow the wiring from the sensor, there's: the O2 itself, then the wires coming off of it, then the sensor connector, then the chassis harness connector, and then the melted part?
Your post leads me to believe that the O2 harness has another connector further up? If that's true then if I can gain access to that I can just change that portion of the harness and then connect the new O2 sensors correctly.
Le Mans Master
Joined: Oct 2010
Posts: 7,373
Likes: 1,128
From: cold & windy
No, it goes, O2 sensors, wiring that is directly conected to O2 sensors to the plug. It's the 1st plug that the O2 sensors connect to. They are both partially melted, mostly on the plastic portion connected to the O2sensors side of the plug. I might be able to disconnect them but the harness side is also slightly deformed. Which leads me to believe that they would not disconnect correctly and that even if I could get them apart the new connectors from the O2 sensors would not fit.
Your post leads me to believe that the O2 harness has another connector further up? If that's true then if I can gain access to that I can just change that portion of the harness and then connect the new O2 sensors correctly.
Your post leads me to believe that the O2 harness has another connector further up? If that's true then if I can gain access to that I can just change that portion of the harness and then connect the new O2 sensors correctly.
so are you trying to reuse your old sensor connector with a new O2 sensor in hopes that the deformed-to-each-other plugs will match up? that would be possible by simply depinning the connectors & swapping them (assuming the wiring itself is still good)... but to do that, you have to separate the connectors from each other & work from the mating faces. your best bet in that scenario would be to just use the complete new O2 & buy a new plug for the other side. swap the engine harness plug using the depinning method & now you have a factory fit all around
Thread Starter
Race Director
Joined: Feb 2013
Posts: 19,864
Likes: 146
From: South East TN
Well,,, If it were me,,, I would contact www.gmpartshouse.com and ask Gene or Patrick for a new harness pigtail connector and splice that on the the harness.
That way, you can plug the sensors back in like they were designed
The service manual says NOT to splice the sensors as the wires act as a path for fresh air.
My 2 cents..
BC
That way, you can plug the sensors back in like they were designed
The service manual says NOT to splice the sensors as the wires act as a path for fresh air.
My 2 cents..
BC
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