Over the time the exhaust gas recirculation (EGR) system may become plugged with debris, the oxygen sensor may also be getting slow or 'lazy' around this time. When servicing or cleaning the EGR system, it is a good idea to replace the oxygen sensor because it works in tandem with the EGR system.
Replace Oxygen Sensor When Servicing EGR System on Toyota RAV4
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Yes I had the oxygen sensor replaced last year trying to get the check engine light off and state emission test passed
Can I do it myself? I have 275,000 kms. showing. Is it worth fixing or should I just keep repla...
One or more oxygen sensors may fail resulting in illumination of the Check Engine Light.
Just bought and it passed smog easily. No vacuum leaks as far as I can tell. idles smooth and r...