Lately my 2007 Impala has been running a little rough especially at startup so I figured I would hook up my autocal and take some recordings of my drives. Everything looked ok except a few things.

Short Term Fuel Trim Bank 2 stayed at -100% for entire drive.

Long Term Fuel Trim Bank 2 stayed at -100% for entire drive.

Heated o2 Sensor Bank 2 Sensor 1 read 0 MV for entire drive.

I looked through my GM Manuals and found a bulletin that says these readings may be somewhat normal but only for the 5.3l SS version and only when the car is in park idling or "Closed Loop". I continued digging and found that the manuals only refer to Bank 1 sensors 1 and 2 with no such references to Bank 2 sensors. So basically I was curious if this sounds normal or does the autocal program not have a PID for Bank 1 Sensor 2 for my Impala?