Question

1997 Toyota 4Runner with code P1135, how do I fix the code?

Answer 1

HI there

This code points to a problem with the heater circuit for the front O2 sensor on bank 1. Normally this is a problem with the sensor itself, but you should also check the fuses.

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

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