I just finished up some service and have a new DTC on the scanner. P2240 Oxygen Sensor ahead of cat conv bank 2 - no signal. From the very little I can find it sounds like a bear of a project to replace, so I'm hoping its just a harness that came loose while I had things apart or something. I just wanted to confirm this would be indicating the sensor in the exhaust manifold on the driver side, like I have marked in the diagram. Also if anyone has any suggestions or info on replacing these and wants to share I would appreciate it. It's an 09 CTTS.

Thanks
Tim