How do I fix the P1155 error?

Question

2001, Toyota, RAV4, 2.0, 4 wheel drive

Answer 1

HI there

This code is for the heater circuit on the bank 2 sensor 1 O2 sensor heater. Most of the time the problem is with the O2 sensor itself. Here is a list of other possible causes.

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

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