whitesnake SC400 Posted July 20, 2009 Share Posted July 20, 2009 Hi, i have check engine light with "lean fuel mixture" error code (most common failures for this code are airflow sensor or oxygens sensor). I took car to Lexus dealer. They diagnosed fault in air flow sensor and offered to replaced it with a new unit (price approx 1400 usd!!!). I told them that they were full of *BLEEP* with this pricing. I am not completely sure dealership got diagnostics right. Engine runs and idles fine. Fuel consumption haven't increased noticably. When i unplug MAF i observe rough idling and car jerks when i drive at low rpms. Is there a way to confirm failure of AFM with ohmmeter tool? I checked resistance between each electrical connectors (pins) of AFM but only 1st and 2nd (if you count frim the right side of installed sensor) had some impendance while other pairs were open circuit. Hope someone had done it before and could advise. Best regards, Stan Quote Link to comment Share on other sites More sharing options...
jzz30 Posted July 21, 2009 Share Posted July 21, 2009 more than likely its your o2 sensor. not the maf. Quote Link to comment Share on other sites More sharing options...
djmicah Posted July 21, 2009 Share Posted July 21, 2009 i have a good maf for sale off 93 sc400 if you want to buy it Quote Link to comment Share on other sites More sharing options...
whitesnake SC400 Posted July 23, 2009 Author Share Posted July 23, 2009 Thanks JZZ, is there reliable procedure to identify shot MAF or O2 sensors? Quote Link to comment Share on other sites More sharing options...
whitesnake SC400 Posted July 27, 2009 Author Share Posted July 27, 2009 P.S. error code 24 appears after driving some time on a freeway at speed over 50mph. When i drive inside city check engine light does not light up. Hope it adds some info in order to identify what's wrong with my car. Quote Link to comment Share on other sites More sharing options...
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