sainikai Posted August 9, 2004 Share Posted August 9, 2004 I have 93 LS 400. Yesterday, engine light came on. I went to different places to check up why engine light came on but no-body was able to find why. Finally, I went to Lexus dealership and they detected Oxygen Sensor needs to be replaced. Dealership estimated about $292. Does anyone know Oxgen sensor have to be fixed? What are the consequenses if not fixed? Any suggestions for cheaper replacement? Any help is greatly appreciated. Thanks. Quote Link to comment Share on other sites More sharing options...
95LS400Bob Posted August 9, 2004 Share Posted August 9, 2004 Oxygen sensors are critical components. It's how the computer tells the air fuel ratio. If it is truly bad, you need to replace. It will pay you back in fuel savings over running with a bad one. But... The 95 I just bought...the owner said the check engine light was on and he had the codes read and it needed an Oxygen sensor replaced. I was going to do that but while going over the engine compartment, I found a split vacuum hose at the intake plenum. I fixed that and the check engine light has been out ever since. Something you might want to check. Quote Link to comment Share on other sites More sharing options...
sainikai Posted August 9, 2004 Author Share Posted August 9, 2004 Where is intake plenum located? Quote Link to comment Share on other sites More sharing options...
95LS400Bob Posted August 9, 2004 Share Posted August 9, 2004 Top middle dead center of the motor. Can't miss it. It has the L insigina. Aluminum looking thing. :D Quote Link to comment Share on other sites More sharing options...
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