Toyota Avalon 2000. Where is the bank 2 sensor 1 located?

Question

Check Engine light on, code p1150 & p1155 is on scanner.

Answer 1

P1150 Lack of H02S switch Bank 2 Sensor 1

P01155 A/F fuel ratio sensor heater circuit malfunction Bank 2 Sensor 1

The location of the A/F sensor or what is commonly reffered to as the 02 sensor , Being at bank 2 this is where cylinder 2,4,6 are located.  Being sensor 1 this is the upstream 02 sensor