LS 4000 Posted September 22, 2009 Share Posted September 22, 2009 I've posted about my intermittent starting issue. Now i have gotten the CEL codes for my car. Im getting codes 21 and 31. These are air flow meter signal and main oxygen sensor signal would either of these make the car not start at times? and other than than the o2 sensor what should I replace for the air flow sensor code. here is the procedure i used to get the obd1 codes for my LS400 http://www.lexls.com/tutorials/intro/codereading.html Thanks !!! B) Quote Link to comment Share on other sites More sharing options...
python Posted September 22, 2009 Share Posted September 22, 2009 start with the 02 sensors then reset the computer Quote Link to comment Share on other sites More sharing options...
shoob Posted August 19, 2012 Share Posted August 19, 2012 im also getting 24 31 and 71. run down: http://www.clublexus.com/forums/ls400/650823-please-help-my-ls-is-going-nuts.html Quote Link to comment Share on other sites More sharing options...
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