Toyota RAV4 Problem Report

Toyota RAV4 Replace Oxygen Sensor When Servicing EGR System

(3 reports)

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.

Yes I had the oxygen sensor replaced last year trying to get the check engine light off and state emission test passed -
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