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 Post subject: O2 Sensor location
PostPosted: Wed Mar 28, 2012 4:59 pm 
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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


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 Post subject: Re: O2 Sensor location
PostPosted: Wed Mar 28, 2012 5:05 pm 
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It's on the top of the rear exhaust manifold, in the back of the engine compartment.

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 Post subject: Re: O2 Sensor location
PostPosted: Wed Mar 28, 2012 5:18 pm 
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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.

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Last edited by myfirstbonnie on Wed Mar 28, 2012 5:19 pm, edited 1 time in total.

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 Post subject: Re: O2 Sensor location
PostPosted: Wed Mar 28, 2012 11:15 pm 
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so the one behind the cat is bank 1 sensor 1??


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 Post subject: Re: O2 Sensor location
PostPosted: Wed Mar 28, 2012 11:17 pm 
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also the bank 1 sensor 2, that would be considered upstream correct?


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 Post subject: Re: O2 Sensor location
PostPosted: Wed Mar 28, 2012 11:42 pm 
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No, it's the downstream, behind the cat. I didn't read closely enough.

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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 1:06 am 
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Lol ok so Bank 1, sensor 2 is behind the cat/downstream?


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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 2:03 am 
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Yes.

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

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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 8:40 am 
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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


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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 9:35 am 
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What if I just deleted the cat all together??


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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 9:41 am 
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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.

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Last edited by SSEiMan01 on Thu Mar 29, 2012 9:41 am, edited 1 time in total.

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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 9:46 am 
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Say I just delete it, is there any other negatives besides throwing a code?


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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 9:49 am 
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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?

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Last edited by SSEiMan01 on Thu Mar 29, 2012 9:50 am, edited 1 time in total.

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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 10:17 am 
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I'm in FL they could care less here lol


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 Post subject: Re: O2 Sensor location
PostPosted: Thu Mar 29, 2012 1:44 pm 
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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.

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 Post subject: Re: O2 Sensor location
PostPosted: Sat Mar 31, 2012 12:32 am 
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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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