repaced a/f sensor under heat shield with 234-9028,now why am i getting code p1155 ???

Question

cant determine what sensor is bad and what denso part number to use to fix the problem,where is the sensor located ??

Answer 1

Hi there,

This code indicates an issue with the air/fuel ratio sensor. Since you have already replaced this sensor, I would suggest checking for faulty wiring. Here is some more info for you.

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

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