Lo Everyone:
I have a 1996 Acura 2.5TL and want to know if there is an oxygen sensor after the CAT Converter.
Where is it?
How does it affect changing the system to a CAT back performance exhaust?
Thank you for any help.

 

I have a 97 2.5TL, and I just changed it out last weekend.
It's hidden under the heatsheild right at the end of cat.

As far as the 2nd question, I have no clue.

 

New here!!!

...I think acura oxygen sensor is located in the header. And I believe that the 2nd o2 sensor does not impact mixture (this is done by the primary).. so that being the case the 2nd sensor is really their to throw a cel if it doesn't get a eading that is better then the first. (indicating a functioning CAT).

 

^ Wow... So off the original question (however strange the question was) it's not even funny.

Having a cat-back will not throw any CELs or anything of the sort. The rear O2 sensor is IN the catalytic converter's housing. It basically checks to see if the cat is functioning properly. Having a cat-back, as the name suggests, will replace the piping that connects to the rear of the cat all the way to the muffler tips.

~Cheers~

 

I'm like what???????????to the whole question

 

Hmm, it appears the post above mine was deleted by whomever posted it... I wasn't referring to meazz in the "^" but the guy who had posted after him.

~Cheers~

 

How do you get to the front oxygen sensor, the one before the cat? ok to use the aftermarket OE style replacements? I suspect a thottle body clean tripped the one I have in now, can it be serviced or cleaned?

 

There are two, one in each exh. manifold. I'm assuming those are what you are referring to.

~Cheers~

 

Mine is a 2.5 with one in front and one in back of the cat- is the one in front hard to remove- do I need a special tool?

 

you have to remove the battery and the shield, long extension and oxy sen socket. it took me about 45 min.

 

ok, so you cannot access it from underneath the car? I am glad I checked with you all - the only/best way to get to the front O2 sensor is through the engine bay? again, this is a 96 2.5.

 

^ Sorry, I was referring to the 3.2. To get mine out, I just grabbed it with a clamp and turned. It was a bitch but I got it off after a couple tries.

~Cheers~

 

I don't know f you can access it from underneath or not. The service manual states to get it from the engine bay.
Mine is a 97 2.5 TL, I think it's the same.
You have to get underneath to remove the electric cover to get the connector out.
There's a service manual link here, do a search. some kind forum member posted a link.

 

I actually have the 2.5tl factory service manual, and cannot see anything about how to access - will check again, but if anyone has a page number showing how to get to it, that would be very helpful. thanks for all the help so far.

 

Engine / Intake manifold - Exhust manafold , Page 9-6.

 

I want to do it myself bc i dont want to pay to do sumthin that i heard was easy to do. But i dont know how to get to the downstream oxygen sensor i mean i got to it but i cant get the part where the wires are from the socket..does anyone know how to do this...

 

^ ??

If the sensor is stuck, use vise grips, some PB, and a bit of elbow grease and it should come out.

~Cheers~