Question

How to rectify the engine codes P1135 and P1155 of 2001 Toyota RAV4?

Answer 1

P1135 A / F sensor heater circuit  malfunction Bank 1 Sensor 1

P1155 A / F sensor heater circuit  malfunction Bank 2 Sensor 1

This code usually represent a 02 sensor that has been replaced with a aftermarket type, You may have to replace and use OEM type, Also the A /F is fuse protected, Listed in the engine fuse box # F12 replace if open, This also has a relay controlled heater circuit, replace the A / F relay . Both sensor going out at the same time is very rare. So try relpacing the relay as a first step.

Answer 2

P1135 Toyota Code - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Read more: https://www.autocodes.com/p1135_toyota.html

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