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O2 Sensor location
http://www.pontiacbonnevilleclub.com/forum/2000-2005-other-than-gxp/topic31881.html
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Author:  3800Charged [ Wed Mar 28, 2012 4:59 pm ]
Post subject:  O2 Sensor location

My friend has a Autotap program so we logged my car and I have a bad O2 sensor it wasn't doing anything, where exactly is my Bank 1 sensor 2 at? Thanks

Author:  00Beast [ Wed Mar 28, 2012 5:05 pm ]
Post subject:  Re: O2 Sensor location

It's on the top of the rear exhaust manifold, in the back of the engine compartment.

Author:  myfirstbonnie [ Wed Mar 28, 2012 5:18 pm ]
Post subject:  Re: O2 Sensor location

There are only 2 O2 sensors. One where Ed said and the other behind the cat. How many did you see on the scanner? There should be a "Bank 1 sensor 1" and "bank 1 sensor 2".

Sensor 1 is where Ed said on the back of the exhaust manifold by the firewall. Sensor 2 is the one behind the cat.

Author:  3800Charged [ Wed Mar 28, 2012 11:15 pm ]
Post subject:  Re: O2 Sensor location

so the one behind the cat is bank 1 sensor 1??

Author:  3800Charged [ Wed Mar 28, 2012 11:17 pm ]
Post subject:  Re: O2 Sensor location

also the bank 1 sensor 2, that would be considered upstream correct?

Author:  00Beast [ Wed Mar 28, 2012 11:42 pm ]
Post subject:  Re: O2 Sensor location

No, it's the downstream, behind the cat. I didn't read closely enough.

Author:  3800Charged [ Thu Mar 29, 2012 1:06 am ]
Post subject:  Re: O2 Sensor location

Lol ok so Bank 1, sensor 2 is behind the cat/downstream?

Author:  01bonneSC [ Thu Mar 29, 2012 2:03 am ]
Post subject:  Re: O2 Sensor location

Yes.

How many miles on the car? A goofy reading from the rear O2 (read: catalyst) sensor can mean a bad Cat as well.

Author:  3800Charged [ Thu Mar 29, 2012 8:40 am ]
Post subject:  Re: O2 Sensor location

90k miles, I'm proli gonna do exhaust soon so if that's the case it shouldn't be a problem regardless then I guess lol

Author:  3800Charged [ Thu Mar 29, 2012 9:35 am ]
Post subject:  Re: O2 Sensor location

What if I just deleted the cat all together??

Author:  SSEiMan01 [ Thu Mar 29, 2012 9:41 am ]
Post subject:  Re: O2 Sensor location

There is really no need to. Just get a high flow cat. I have seen some not throw a rear O2 code with an aftermarket cat. Mine did though. But deleting the cat alltogether is a sure fire way to throw a code.

Author:  3800Charged [ Thu Mar 29, 2012 9:46 am ]
Post subject:  Re: O2 Sensor location

Say I just delete it, is there any other negatives besides throwing a code?

Author:  SSEiMan01 [ Thu Mar 29, 2012 9:49 am ]
Post subject:  Re: O2 Sensor location

Where do you live? Check local laws, it may not be legal for emissions or inspection purposes.
Anyone else want to chime in with anything I may be forgetting at the moment?

Author:  3800Charged [ Thu Mar 29, 2012 10:17 am ]
Post subject:  Re: O2 Sensor location

I'm in FL they could care less here lol

Author:  01bonneSC [ Thu Mar 29, 2012 1:44 pm ]
Post subject:  Re: O2 Sensor location

3800Charged wrote:
90k miles, I'm proli gonna do exhaust soon so if that's the case it shouldn't be a problem regardless then I guess lol


What do you mean by "do exhaust"? Its full stainless already and very hard to out flow stock exhaust. a down pipe and hiflo cat would be choice first moves. Mufflers only change sound, stock ones are very free flowing.

Author:  3800Charged [ Sat Mar 31, 2012 12:32 am ]
Post subject:  Re: O2 Sensor location

i was thinking about doing a larger diameter exhaust all the way back. Is this a waste of time? The stock exhaust really flows that well? Why is the downpipe so restrictive?

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