Changing O2 Sensors

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01-17-2011, 04:16 PM
evil-G-nius

Changing O2 Sensors

WEll I have not changed to one up front, but the rear sensor is changed and was a bitch. So for those of you with a 96 - 98 7G here is a little info you may no know. The second sensor comes into the car behind the radio, so you have to take apart quite a bit to get to it. First you will have to take the lower part of the driver side dash apart, then you will have to take the side kick panel off of the center console (near the gas pedal) and THEN you can get to the pig tail!

http://i22.photobucket.com/albums/b3...s/DSC02444.jpg

^^^this is with the dash portion on...but I had removed it as you can see because the center kick panel is removed. There is no way to remove that because of some screws that are attached to the dash.

http://i22.photobucket.com/albums/b3...s/DSC02445.jpg

^^^after that panel is removed, peel the carpet back a little and look on the floor behind the radio....

http://i22.photobucket.com/albums/b3...s/DSC02446.jpg

^^^and you will see the connection in the interior of the car.
This is not really a tutorial because changing these sensors is pretty straight forward....unscrew it...replace it. But finding the shit in the car was a pain! LOL So now you know. According to MKO some of the years...94-95 have the sensor come into the car under the driver seat but I cant attest to that. Just thought this would be a good FYI
01-17-2011, 04:25 PM
galantlvr34

Quote:

Originally Posted by evil-G-nius

WEll I have not changed to one up front, but the rear sensor is changed and was a bitch. So for those of you with a 96 - 98 7G here is a little info you may no know. The second sensor comes into the car behind the radio, so you have to take apart quite a bit to get to it. First you will have to take the lower part of the driver side dash apart, then you will have to take the side kick panel off of the center console (near the gas pedal) and THEN you can get to the pig tail!

http://i22.photobucket.com/albums/b3...s/DSC02444.jpg

^^^this is with the dash portion on...but I had removed it as you can see because the center kick panel is removed. There is no way to remove that because of some screws that are attached to the dash.

http://i22.photobucket.com/albums/b3...s/DSC02445.jpg

^^^after that panel is removed, peel the carpet back a little and look on the floor behind the radio....

http://i22.photobucket.com/albums/b3...s/DSC02446.jpg

^^^and you will see the connection in the interior of the car.
This is not really a tutorial because changing these sensors is pretty straight forward....unscrew it...replace it. But finding the shit in the car was a pain! LOL So now you know. According to MKO some of the years...94-95 have the sensor come into the car under the driver seat but I cant attest to that. Just thought this would be a good FYI

wow that is a pain.it sucks to have to take apart the whole interior just to change the o2 sensor.
01-17-2011, 04:41 PM
evil-G-nius

Yeah that is for the second O2...the other one in the engine bay shouldnt be too bad. But that was a real pain!
01-17-2011, 04:44 PM
galantlvr34

Quote:

Originally Posted by evil-G-nius

Yeah that is for the second O2...the other one in the engine bay shouldnt be too bad. But that was a real pain!

i am glad i dont have replace my o2 sensors.my o2 is under the driver seat to i guess because my car is a 1994.
01-17-2011, 04:47 PM
evil-G-nius

Yeah...maybe...thats what MKO told me cuz he thought I had a 95. But as was pulling shit apart I traced it....and it was under the radio in the floor in the dash. I mean WTF? LOL Now you know why they charge so much to do shit labor wise
01-17-2011, 04:51 PM
galantlvr34

Quote:

Originally Posted by evil-G-nius

Yeah...maybe...thats what MKO told me cuz he thought I had a 95. But as was pulling shit apart I traced it....and it was under the radio in the floor in the dash. I mean WTF? LOL Now you know why they charge so much to do shit labor wise

yeah it is a lot of work just to get to it,but it is worth it.i love my car.
01-17-2011, 10:10 PM
allrice4g64

im so glad my car has only my wideband and my front 02 sensor. rear is just for emissions you dont even need unless your trying to pass emissions tests.
01-17-2011, 10:53 PM
kolio

uhhhhh i don't know why you went through all that. on my car the rear o2 plug is under the drivers seat.

i don't know why you even changed it. it's usless. i had mine disconnected for 4 months and never through a check engine light or cause any problems. it only monitors the efficiency of the cat.
01-18-2011, 02:54 AM
evil-G-nius

^^^Like I said on some its under the seat...mine obviously is not. I had to go through all that to get it swapped out. I am changin both of mine in hopes to pass my emissions...you live in MD...in Cali they are a bitch about EVERYTHING emissions!
01-18-2011, 12:28 PM
peanotation

i can attest to the 94-95s having the rear 02 sensor pigtail come in under the driver's seat, didn't know they changed it for the 96+
01-18-2011, 12:47 PM
evil-G-nius

yeah I had to find out the hard way! LOL Not sure on 97-98 but I would imaging its like mine.
01-18-2011, 06:32 PM
kolio

Quote:

Originally Posted by evil-G-nius

^^^Like I said on some its under the seat...mine obviously is not. I had to go through all that to get it swapped out. I am changin both of mine in hopes to pass my emissions...you live in MD...in Cali they are a bitch about EVERYTHING emissions!

i passed 2 years ago with the wires to the rear o2 sensor severed. lol

i just passed last week again. my car smelled so rich lol. i was like let me scoot away real quick before they fail me. i have this check engine light that comes and goes whenever it wants. its for my front o2 sensor.

also my cuz 94 GS has it under the drivers seat.

kimya whats your vin start with?
01-18-2011, 06:33 PM
kolio

Quote:

Originally Posted by peanotation

i can attest to the 94-95s having the rear 02 sensor pigtail come in under the driver's seat, didn't know they changed it for the 96+

mine is a 97. its under my seat
01-18-2011, 06:52 PM
evil-G-nius

Quote:

Originally Posted by kolio

kimya whats your vin start with?

Gotta look....wonder if that has anything to do with Fed or Cali spec? I am Cali spec I know...wonder if that makes a difference. I would love to get rid of the second cat but again...like I said Cali is a bitch with emissions shit. Ask Peano! LOL We go through hell....although I'll take the smog over the bull shit NJ inspection I used to have to deal with....that shit was rediculous
01-18-2011, 07:07 PM
kolio

Quote:

Originally Posted by evil-G-nius

Gotta look....wonder if that has anything to do with Fed or Cali spec? I am Cali spec I know...wonder if that makes a difference. I would love to get rid of the second cat but again...like I said Cali is a bitch with emissions shit. Ask Peano! LOL We go through hell....although I'll take the smog over the bull shit NJ inspection I used to have to deal with....that shit was rediculous

dam you got a second cat. i have no cat........ lol
01-18-2011, 10:27 PM
Galanttuner10

mine is a cali car too damn having 2 cats stock, thats not gonna last long for me
01-19-2011, 02:14 AM
evil-G-nius

So I wonder if ^^^yours is in the same spot as mine or it it is under the seat. Yours is a 95 right?
01-19-2011, 03:33 AM
Galanttuner10

mine is a 96
01-19-2011, 04:07 PM
mko

mine is 94 cali spec. it has 2 sensors. 94 mitsus use only one , i guess the second o2 sensor was added as a future implementation of the obd2
01-19-2011, 07:38 PM
evil-G-nius

Hmm...good to know. So I would imagine if you have a Cali spec with a second cat....the O2 sensor will enter where mine is. If you are fed spec (guessing here) or OBD1 - 1.5 then its under the seat? That is just wierd that they would put in two different spots like that
01-20-2011, 08:29 PM
eksz

The 95 S model I just parted out had two O2 sensors. The opening for the O2 sensor under the seat was located slightly behind the driver's seat front left mounting bolt. If you slide the seat to its rear most position you might be able to feel the wiring where it passes thru into the car.

While I did not try this personally because I was parting out the car, I believe you could access the connector for the under the seat O2 sensor without having to remove the floor carpeting. Remove the driver's seat (four bolts) and then the center console. With that done I believe you could reach the connector thru the opening in the carpeting that the transmission shifter and the parking brake poke thru.
01-20-2011, 10:08 PM
evil-G-nius

^^^Nope...not in this case. But its good to know for the next G I get (if ever lol) of where to look
01-21-2011, 11:02 AM
evil-G-nius

So got both changed out...it was definately needed!

Sensor 1
http://i22.photobucket.com/albums/b3...s/DSC02448.jpg
http://i22.photobucket.com/albums/b3...s/DSC02447.jpg

Sensor 2
http://i22.photobucket.com/albums/b3...s/DSC02449.jpg
http://i22.photobucket.com/albums/b3...s/DSC02450.jpg
01-21-2011, 03:00 PM
Predat-R

so was that the reason for the fail emmissions
01-21-2011, 05:54 PM
mko

it has been running lean

Lean = lots of NOx
01-22-2011, 12:52 AM
evil-G-nius

Quote:

Originally Posted by Predat-R

so was that the reason for the fail emmissions

Not sure...going to try to smog it tomorrow morning

Quote:

Originally Posted by mko

it has been running lean
Lean = lots of NOx

Well I hope that the new sensors help even things out a little. Like I said the only issue now (with it running) is its bogging a little like when I am partially driving...maneuvering into the garage and shit