o2 sensor, CEL

I'm getting the following error codes:
p0154 o2 sensor circ. Bank 2 - sensor 1 no activity detected
p1120 o2 sensor heater circ. bank 2 - sensor 1 open

I'm thinking I have a bad o2 sensor. I believe bank 2 sensor 1 is the front sensor, I'm I correct? where exactly is it located in the 2001 passat? pictures always help :)

thank u

v6 i believe its on the driver side

1.8t there is only one front 02 sensor

v6 i believe its on the driver side

1.8t there is only one front 02 sensor

Thanx,
In the V6 I found out there are two sensors in the passengers side front, i'm not yet sure which one is bank 2 sensor 1. I'll post once I find out.

There are 2 o2 sensors per bank (side of the engine). THe front one is called bank 1 sensor 1. the rear o2 sensor is called bank 1 sensor 2.

I believe bank 1 is on the passenger side and bank 2 on the driver side.