P0156 Toyota 4 runner code

Question

where is the # 2 O2 sensor on the #2 bank of a 2003 toyota 4 Runner located?

Answer 1

P0156 - 02 sensor circuit malfucntion Bank 2 Sensor 2

This is the downstream 02 sensor which will be the catalytic monitor sensor, The location will be the sensor on Bank 2 which is where cylinder 2 is located at.