Oxygen Sensor - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

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post #1 of 20 (permalink) Old 10-23-2012, 11:27 AM Thread Starter
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Oxygen Sensor

I got a P0135 code
Oxygen Sensor Heater
Bank 1
Sensor 1

Can someone tell me or e-mail a pic of where this is located so I can replace it?




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post #2 of 20 (permalink) Old 10-23-2012, 11:36 AM
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Bank one is in the exhaust manifold behind the engine. Jack it up, crawl to the back side of the engine and look straight up. You know what an O2 sensor looks like right? If not I can get a pic.


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post #3 of 20 (permalink) Old 10-23-2012, 01:14 PM
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Only one bank on a Cobalt. (4 cylindre only has one head). Sensor one is the first one in the exhaust stream Usually right after manifold and before cat. Even if you had a code once it doesn't mean your sensor is bad. It could have just gone out of range for a variety of reasons. I would reset the code and wait and see if it comes right back.

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post #4 of 20 (permalink) Old 10-23-2012, 06:54 PM Thread Starter
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Hi Black Balt
Nice ride....Love the whole look!!!
Thanks for the heads up on location.
I do know what a O2 sensor looks like but if you have a pic of location on ex man and where it plugs in that would be awesome.
Thanks Again
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post #5 of 20 (permalink) Old 10-23-2012, 06:56 PM
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they both plug in right behind the motor on the left side. Some cobalts have i directly in the manifold like mine did

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post #6 of 20 (permalink) Old 10-23-2012, 07:00 PM Thread Starter
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Hey Coby 7
Thanks for the response...
I have cleared the code multiple times.
So I think its time....
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post #7 of 20 (permalink) Old 10-23-2012, 07:08 PM
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Well then it's time. What year is your car?

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post #8 of 20 (permalink) Old 10-24-2012, 08:31 AM Thread Starter
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post #9 of 20 (permalink) Old 10-24-2012, 11:36 AM
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I can post a pic tonight of where it would be on yours. Mine is a bit modified make sure you get the OEM replacement and not the bosch. It's cheaper but everyone seems to have problems with the Bosch ones.

---------- Post added at 12:36 PM ---------- Previous post was at 11:56 AM ----------

This is what your DP should "roughly" look like. Notice the plug up by the flex piping. That is where your stock O2 sensor should be.



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post #10 of 20 (permalink) Old 10-24-2012, 02:10 PM
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true story the bosch o2 sensor did not work for me.

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