o2 sensor locations - Toyota Nation Forum : Toyota Car and Truck Forums
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#1 Old 11-19-2012, 08:40 PM
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o2 sensor locations

I have been needing to replace a post cat o2 sensor for a while now, and finally im getting too it. Problem is i cant figure out where it is... the mechanic just said it was the lower sensor, so i ordered a new denso.
When i jacked up the car i looked where the manual said to check , read some posts on TN and still nothing (under driver and passenger side) am i just missing it? or does my car not have a sensor underneath?

this is the image i have been referencing on TN


this is my car and the only sensors i can find. heatshield has been removed, and i began to lube in anticipation of changing it, but then i came to my senses and figured someone would be able to help
thanks in advance

1996 toyo camry LE 4cyl
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#2 Old 11-19-2012, 08:52 PM
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Hmm, is it 4th or 3rd gen Camry?
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#3 Old 11-19-2012, 09:06 PM
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That massive piece of iron between the two O2 sensors is your cataylic converter. The O2 sensor you have pictured with penetrating oil on it is your post-catalytic converter O2 sensor.
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#4 Old 11-19-2012, 09:06 PM
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not to sound silly... how do i find out? I have always just used year etc. to find info
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#5 Old 11-19-2012, 09:14 PM
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excellent thank you. So is their no sensor underneath my car?
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#6 Old 11-19-2012, 09:38 PM
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Quote:
Originally Posted by Lummpy5 View Post
not to sound silly... how do i find out? I have always just used year etc. to find info
To whom or what are you asking this question to? To my response back on where your post-cat O2 sensor is located? Really?

Well, here is a pic that I sure hope convinces you.

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#7 Old 11-19-2012, 09:40 PM
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Quote:
Originally Posted by Lummpy5 View Post
excellent thank you. So is their no sensor underneath my car?
Not underneath a 4-cylinder 5S-FE engined car, no. For a 1MZ-FE V6 engine, there would be an O2 sensor under such a car, as the catalytic converter is located between the front seats underneath the car, not by the radiator as the 5S-FE's location is.
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#8 Old 11-19-2012, 09:48 PM
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thanks, everything i was reading was contrary to what i was seeing. And being that the sensors are not exactly cheap i really did not want to replace the wrong one ( if their were multiple )
thanks again

Quote:
Originally Posted by 93celicaconv View Post
To whom or what are you asking this question to? To my response back on where your post-cat O2 sensor is located? Really?

Well, here is a pic that I sure hope convinces you.

no that was in response to russki

Last edited by Lummpy5; 11-19-2012 at 09:50 PM.
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#9 Old 11-19-2012, 09:52 PM
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No problem. You can't replace the wrong one in this particular setup. The post-Cat O2 sensor screws into the exhaust pipe. The pre-Cat O2 sensor is flanged with two bolts holding the flange in place. You can't put the right O2 sensor in the wrong location on this particular setup.
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