Question

I need part no. for P1155 code on 2003 Toyota RAV4 upstream bank 2 sensor 1

Answer 1

P1155 A/F Sensor heater circuit malfunction (Bank 2 Sensor 1)

The part number for the upstream A/F sensor.  Upper right 8946742020

The part number for the upstream A/F sensor . Upper left  8946742010

Answer 2

P1155 Toyota Code - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1
Read more: https://www.autocodes.com/p1155_toyota.html