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Old 09-20-2016, 02:47 PM
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2009 wk oxygen sensors

I have a faulty O2 sensor bank 1 sensor 2. I'm assuming that is drivers side behind the cat? If so I'll replace that one. Anyone have any tips? Should I replace all 4 while i'm at it? Dealer wants to charge me $230 so i'm gonna try it myself.

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Old 09-20-2016, 05:31 PM
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Re: 2009 wk oxygen sensors

i think 2 are easy and 2 are tough , you can crawl under and look but if you do it your self i think 2 are hard to get at
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Old 09-20-2016, 06:21 PM
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Re: 2009 wk oxygen sensors

Thanks.

I just crawled under while it was on the ground and it looks like 2 are fairly easy as long as they aren't seized up. I'll probably attempted within the next month. It's a downstream sensor so my understanding is it shouldn't harm the cat if left untreated.
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Old 09-21-2016, 01:15 PM
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Re: 2009 wk oxygen sensors

they come out better then you think had some on my 1998 grand looked at it and went "wow" but a little liquid wrench and it came right out, not sure a bout o2 sensor not harming cat convertor if it is not working correctly.
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Old 10-13-2016, 06:12 PM
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Re: 2009 wk oxygen sensors

Down stream O2s do basically nothing but lie about cat efficiency and go bad, so the only reason to replace them is to get rid of their associated codes. The upstream O2s do basically everything related to fuel/air ratio in your engine, which is pretty important and can get you better power and mileage if the ones you have are going out.
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Old 11-12-2016, 06:11 PM
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Re: 2009 wk oxygen sensors

Downstream o2 actually contributes to the ait fuel ratio in our jeeps man. I've learned this by being to 3 dealers and speaking to many techs. I have been chasing o2 codes p2096 and p0133 for a very long time. Zero success I am at a complete loss but I know a lot more than I would like to about o2. A downstream o2 throwing lean WILL ABSOLUTELY cause a change in your a/f ratio. These sensors did not used to be this way. But they are.
Btw any pointers in the code dept for me are appreciated lol I have a post already
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Old 11-12-2016, 06:14 PM
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Re: 2009 wk oxygen sensors

Quote:
Originally Posted by sdp5140 View Post
I have a faulty O2 sensor bank 1 sensor 2. I'm assuming that is drivers side behind the cat? If so I'll replace that one. Anyone have any tips? Should I replace all 4 while i'm at it? Dealer wants to charge me $230 so i'm gonna try it myself.
Depending on the code it can harm your cat bud. Stay away from the lean codes especially. You motor will end up trying to compensate and it will push more fuel. You know where unburned fuel goes. It goes into your cat on the hwy when its 1300 degrees. I think you have a tsb for down stream o2 erroneous codes. Seems like every jeep does. Mine did too.
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