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$61 question (O2 sensor) #922020 04/07/04 12:18 PM
Joined: May 2003 Posts: 6 Charlotte, NC S Special Ed OP Newbie
OP Special Ed Newbie S Joined: May 2003 Posts: 6 Charlotte, NC	Hello all, As my post-count attests, I'm a newbie, but I have been lurking for a while, and have searched a bit. I recently started seeing poorer milage, and then got a CEL about a week ago. Went to Auto Zone; they pulled PO133, which prompted me to purchase the new O2 sensor for Bank 1 upstream. With the instructions found here, and the help of the easter bunny's small paws, I hope to replace this weekend. My question: this seems to be a common problem (2.5L w/ 69K) for bank 1, and I'm wondering if I should pre-emptively replace the upstream sensor on bank 2 as a precautionary measure. I welcome your thoughts on this ... should I expect the bank 2 sensor to expire soon? Thanks, -Ed. 98 MTX 2.5L SE (late) 84K miles, nice new reman alternator.

Re: $61 question (O2 sensor) #922021 04/07/04 12:27 PM
Joined: Sep 2003 Posts: 2,725 Grand Rapids, Michigan - Chica... H HITMANinMI Hard-core CEG\'er
HITMANinMI Hard-core CEG\'er H Joined: Sep 2003 Posts: 2,725 Grand Rapids, Michigan - Chica...	Originally posted by Special_Ed: Hello all, As my post-count attests, I'm a newbie, but I have been lurking for a while, and have searched a bit. I recently started seeing poorer milage, and then got a CEL about a week ago. Went to Auto Zone; they pulled PO133, which prompted me to purchase the new O2 sensor for Bank 1 upstream. With the instructions found here, and the help of the easter bunny's small paws, I hope to replace this weekend. My question: this seems to be a common problem (2.5L w/ 69K) for bank 1, and I'm wondering if I should pre-emptively replace the upstream sensor on bank 2 as a precautionary measure. I welcome your thoughts on this ... should I expect the bank 2 sensor to expire soon? Thanks, -Ed. When one goes they are all going to fail right after it. Generally they fail about the same time, because they have all been used about the same amount of time. So yeah if you got extra $$$ laying around then buy the extra one.

Re: $61 question (O2 sensor) #922022 04/07/04 12:32 PM
Joined: Jan 2003 Posts: 717 The "Eagles Landing" S SmoothSVT Veteran CEG\'er
SmoothSVT Veteran CEG\'er S Joined: Jan 2003 Posts: 717 The "Eagles Landing"	Ones? 90' Bright Orange Mustang 65k - 13.306@105.1 Looking for another CSVT ~Blas~

Re: $61 question (O2 sensor) #922023 04/07/04 02:09 PM
Joined: Jan 2003 Posts: 717 The "Eagles Landing" S SmoothSVT Veteran CEG\'er
SmoothSVT Veteran CEG\'er S Joined: Jan 2003 Posts: 717 The "Eagles Landing"	Nice edit. 90' Bright Orange Mustang 65k - 13.306@105.1 Looking for another CSVT ~Blas~

Re: $61 question (O2 sensor) #922024 04/07/04 02:12 PM
Joined: Sep 2003 Posts: 1,246 Kwik-E-Mart A Apu Nahasapeemapetil Hard-core CEG\'er
Apu Nahasapeemapetil Hard-core CEG\'er A Joined: Sep 2003 Posts: 1,246 Kwik-E-Mart	If you have money to change them then go ahead. Otherwise, the bank 2 sensor is a lot easier and can be done in 15 minutes. With 70k, I would recommend you to do the intake manifold cleaning too.

Re: $61 question (O2 sensor) #922025 04/07/04 04:33 PM
Joined: May 2003 Posts: 6 Charlotte, NC S Special Ed OP Newbie
OP Special Ed Newbie S Joined: May 2003 Posts: 6 Charlotte, NC	Thanks for the info. I don't really have the extra dough, but since the sensors slowly degrade, I was wondering if I'd see a difference by replacing the other sensor before I got CEL'd. Or maybe save my cats. I recently did the "UIM cleaning w/o removing them" and it was a big help. I have to confess I chickened out on the throttle body cleaning - everything looked nice and clean inside, and the message saying not to clean it made me just close it up again. -Ed. 98 MTX 2.5L SE (late) 84K miles, nice new reman alternator.

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