CEL Came on Today. Bad 02 >:( Can I Replace It Myself? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 11 (permalink) Old 10-09-2012, 03:25 PM Thread Starter
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CEL Came on Today. Bad 02 >:( Can I Replace It Myself?

I turned 19 over the weekend, bye-bye birthday money :(

So is this a woman certified replacement job? (lol) dealership and Walts both said it would be about $150, part + labor. Autozone quoted $80 for part.

I understand that there are two oxygen sensors, I think one is by the manifold, right? Where would the other be?... If I look at both will there be a an obvious visual issue so I can know exactly which one to replace or do I need to go verify which one it is from running the codes again?

I have the worst luck :(

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post #2 of 11 (permalink) Old 10-09-2012, 03:28 PM
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There's one by the manifold and one under the car. Use a dealer replacement only. You may be able to change it yourself depending on skill level. There will be no visible signs, they normally die from contaminants or age.

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post #3 of 11 (permalink) Old 10-09-2012, 03:43 PM
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I just happened to take a picture of this over the weekend. Obviously your under side wont look as pretty as this but heres the location of the other O2 sensor.


Best bet is to take the entire DP out (only five bolts) and unplug the sensor (you can see it run up the heat shield in my pic). Get it on a work bench and put some muscle into it, it's going to be seized in there for sure. Install is 10x easier, just reverse the order of the uninstall and you are done!


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post #4 of 11 (permalink) Old 10-09-2012, 03:53 PM Thread Starter
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Quote:
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I just happened to take a picture of this over the weekend.
Awesome, thank you!

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post #5 of 11 (permalink) Old 10-09-2012, 03:56 PM
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Did they tell you which code and which one was bad. Upstream (before catalytic converter) or downstream (after catalytic converter). Did they reset code? I had an HO2 sensor code two years ago, reset the code and it never came back.

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post #6 of 11 (permalink) Old 10-09-2012, 04:09 PM Thread Starter
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Nah, he didn't specify so I have to go back.

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post #7 of 11 (permalink) Old 10-09-2012, 04:14 PM
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Damn blackbalts, that's one clean car.

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post #8 of 11 (permalink) Old 10-09-2012, 04:46 PM
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He waxed the bottom...

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post #9 of 11 (permalink) Old 10-09-2012, 04:49 PM
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Lol or he has never visited eastern Canada

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post #10 of 11 (permalink) Old 10-09-2012, 07:36 PM
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He waxed the bottom...

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