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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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Bank 1 sensor 1 is the uptream. Only one bank on a 4 cylinder.
 

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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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