PaulS Posted July 5, 2007 Share Posted July 5, 2007 My 2000 ES300 will rarely shift into O/D. The engine light is on but I'm not sure if it is related to the transmission. The Lexus dealer checked the codes which indicated a spark-knock sensor had failed but they did know for sure if replacing the spark-knock sensor would fix the O/D problem. Has anyone out there experienced a problem with their O/D? Any tips would be appreciated. Cheers, Paul Quote Link to comment Share on other sites More sharing options...
wwest Posted July 5, 2007 Share Posted July 5, 2007 My 2000 ES300 will rarely shift into O/D. The engine light is on but I'm not sure if it is related to the transmission. The Lexus dealer checked the codes which indicated a spark-knock sensor had failed but they did know for sure if replacing the spark-knock sensor would fix the O/D problem. Has anyone out there experienced a problem with their O/D? Any tips would be appreciated.Cheers, Paul If there some reason, ANY reason, for the engine ECU to "think" the engine HP/Torque production is not up to snuff then it will not use O/D. In O/D the engine will oftentimes be operating right on the cusp of "lugging", knock/ping. Lowest engine frictional contribution, BEST FE, but only "just" barely producing the required HP given the "cruise" roadspeed. Quote Link to comment Share on other sites More sharing options...
PaulS Posted July 20, 2007 Author Share Posted July 20, 2007 Replacing the Spark Knock sensor fixed the problem. I'm glad I took your advice instead of doing all the things the dealer wanted me to do. Thanks for your help :) Cheers, Paul Quote Link to comment Share on other sites More sharing options...
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