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post #1 of 4 (permalink) Old 07-02-2016, 05:31 PM Thread Starter
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Question about replacing O2 sensor

Okay my 2006 cobalt is throwing P0030 HO2S Heater Control Circuit (Bank 1 Sensor 1). I ordered a replacement O2 for it and it is a downstream sensor. My question is bank 1 sensor 1 would be upstream the? Are these two sensors interchangeable or do I just need to order a new one? Thanks!
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post #2 of 4 (permalink) Old 07-02-2016, 05:38 PM
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Bank 1 sensor 1 is the uptream. Only one bank on a 4 cylinder.

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post #3 of 4 (permalink) Old 07-02-2016, 05:40 PM Thread Starter
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Okay thank you. Sorry I am pretty uneducated when it comes to cars but I'm trying to learn. :p
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post #4 of 4 (permalink) Old 07-02-2016, 05:50 PM
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Sorry my mistake I meant upstream, the one on the manifold.

---------- Post added at 09:50 PM ---------- Previous post was at 09:50 PM ----------

The downstream is the one after the cat.

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