01 avalon p1135/p1155 ?

Question

What is the common problem with the check engine light code p1135/p1155

Answer 1

Hi there

These codes are for the heater circuits on the bank 1 and bank 2 front O2 sensors. I would start by checking the fuses to make sure none are blown, then check the wiring. It's pretty uncommon to have both sensors fail at the same time.

P1155 TOYOTA - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1

Read more: https://www.autocodes.com/p1155_toyota.html

P1135 TOYOTA - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1

Read more: https://www.autocodes.com/p1135_toyota.html