Driver or passenger? I think I have an exhaust leak on my passenger side header and I'm getting a heater code on Bank 2 Sensor 1. So it'd make sense that cooler air is getting in and not heating the O2 sensor enough.

 

it's the passenger side

 

Bank 2 is passenger side as far as i know

 

Bank 1 is technically defined as the bank containing cylinder #1.
Us poor Aussies and Kiwis have been known to get a little confused <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> about which side is really the passenger side.
So many times I have grabbed the door handle while trying to shift gears while driving in the US. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
And how stupid <img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" /> do I feel each time I get in the wrong side.