Possible Cause of P1135 Code on 2002 4runner

Question

2002 4Runner with 3.4L V6 sets P1135 and it will clear itself and reset upon additional driving.

Answer 1

Hi there

This code is for the O2 sensor heater circuit. Without a scan tool that can read active data it's difficult to know which sensor is the problem. All of the sensors are heated, this code means the circuit is having a problem