2003 Toyota Sienna Q&A
2003 Toyota Sienna Question: Oxygen Sensor
You should get a repair manual with step-by-step instructions and diagrams on this repair. You'll need the help. You can also check out www.alldatadiy.com. - matte
I have a code that says the oxygen sensor is bad , but i replaced both the front and rear sens...
One or more oxygen sensors may fail resulting in illumination of the Check Engine Light.
code is po135 oxygen heater circut malfunction. I replaced both front and rear oxygen sensors but that did not help. someone said they thought there was 4 oxygen sensors on this year vehi...