2013 DB9.2 - V12 Banks and Vacuum Pump

[AM-DB9]

Hi,
Just recently took delivery of my new baby and sorting though things i have two questions (so far).

1. Sitting in the drivers seat which side of the V12 would be considered Bank1?
I have a slow response O2 sensor in Engine Bank 1, O2 sensor bank 2, sensor 1

2. My DB9 came with a Quicksilver muffler, vacuum lines plugged - is the rear vacuum pump used for anything else besides the factory muffler valve control?

Regards...

[magycks]

2. Vacuum pump is to actuate the valves on OEM exhausts to switch between quieter (vacuum on/valve closed) and louder (vacuum off/valve open) modes. I don't believe your Quicksilver backbox has any valves.

[kabman]

1. Sitting in the drivers seat which side of the V12 would be considered Bank1?
I have a slow response O2 sensor in Engine Bank 1, O2 sensor bank 2, sensor 1

Bank 1 would be on the right. Sensor bank 2 means the rearmost group of 3 cylinders and Sensor 1 means upstream of the catalyst. A quick check is to swap it with the sensor on the front group of three cylinders and see if the fault follows the sensor.

2. My DB9 came with a Quicksilver muffler, vacuum lines plugged - is the rear vacuum pump used for anything else besides the factory muffler
valve control?

It's not used for anything else.