what is code p0156 for 2004 avalon

Question

where is oxygen sensor bank 2 sensor 1 located in 2004 avalon

Answer 1

P0156 02 sensor heater ciircuit malfunction Bank 2 Sensor 2

Bank is where the number 2 cylinder is located Being sensor 2 this is the downstream 02 sensor or the catalytic monitor sensor ,It is number 4 in this diagram