Sam1974 Posted March 23, 2016 Share Posted March 23, 2016 I purchased es300 year 2001. It had check engine and traction off light on. Checked on code scanner it showed knock sensor. After changing get that it started showing o2 sensors codes. Finally turned out to be spark plug and vacuum pipe leak issue. Now it's great passed emission Quote Link to comment Share on other sites More sharing options...
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