Oxygen Sensor Wiring
Thread Starter
Racer
Joined: Jun 2013
Posts: 284
Likes: 22
From: Concord NH
Oxygen Sensor Wiring
I'd like to replace the wires that run to my oxygen sensors (sensor 1 on both bank 1 and 2). Trouble is, they pass from the sensor up around the bell housing into the either that is the back of my engine! Somewhere back there they mysteriously meld with the rest of the wiring and become surrounded in the wiring loom... its magic, for sure...
I have the shop manual through ALLDATA, but it doesn't show me the path of the wiring. I presume that it comes from the PCM, which I haven't found...
The wiring is old, the colors have faded, numerous splices in the past have made it nearly impossible to splice in new wiring.
So, does anyone have a diagram showing WHERE the wires originate from and what path they travel to reach the O2 sensors? I can certainly weave a new path once i have found the point of origin.
Lastly - is that 16 gauge wire? Is it special wiring that is meant to handle the heat around the engine? Probably NOT something I'll find at my local auto parts or Lowes...
Thank you in advance for your helpl!
Jeff
I have the shop manual through ALLDATA, but it doesn't show me the path of the wiring. I presume that it comes from the PCM, which I haven't found...
The wiring is old, the colors have faded, numerous splices in the past have made it nearly impossible to splice in new wiring.
So, does anyone have a diagram showing WHERE the wires originate from and what path they travel to reach the O2 sensors? I can certainly weave a new path once i have found the point of origin.
Lastly - is that 16 gauge wire? Is it special wiring that is meant to handle the heat around the engine? Probably NOT something I'll find at my local auto parts or Lowes...
Thank you in advance for your helpl!
Jeff
Tech Contributor
Joined: Jan 2007
Posts: 19,422
Likes: 1,146
From: Dyer, IN
I'd like to replace the wires that run to my oxygen sensors (sensor 1 on both bank 1 and 2). Trouble is, they pass from the sensor up around the bell housing into the either that is the back of my engine! Somewhere back there they mysteriously meld with the rest of the wiring and become surrounded in the wiring loom... its magic, for sure...
I have the shop manual through ALLDATA, but it doesn't show me the path of the wiring. I presume that it comes from the PCM, which I haven't found...
The wiring is old, the colors have faded, numerous splices in the past have made it nearly impossible to splice in new wiring.
So, does anyone have a diagram showing WHERE the wires originate from and what path they travel to reach the O2 sensors? I can certainly weave a new path once i have found the point of origin.
Lastly - is that 16 gauge wire? Is it special wiring that is meant to handle the heat around the engine? Probably NOT something I'll find at my local auto parts or Lowes...
Thank you in advance for your helpl!
Jeff
I have the shop manual through ALLDATA, but it doesn't show me the path of the wiring. I presume that it comes from the PCM, which I haven't found...
The wiring is old, the colors have faded, numerous splices in the past have made it nearly impossible to splice in new wiring.
So, does anyone have a diagram showing WHERE the wires originate from and what path they travel to reach the O2 sensors? I can certainly weave a new path once i have found the point of origin.
Lastly - is that 16 gauge wire? Is it special wiring that is meant to handle the heat around the engine? Probably NOT something I'll find at my local auto parts or Lowes...
Thank you in advance for your helpl!
Jeff
Well, service manual to the rescue again.......
The schematic has two identifications on either side of a wire. The identification to the left indicates the diameter in millimeters and wire color. The identification to the right is the circuit number.
You have to remove the right front wheel for access to the PCM.
Last edited by lucky131969; May 26, 2026 at 05:32 PM.
Tech Contributor
Joined: Jan 2007
Posts: 19,422
Likes: 1,146
From: Dyer, IN
