BillyC Posted December 11, 2003 Share Posted December 11, 2003 The check engine light on my 91 LS400 came on last night on the way home from work. It stayed on for about 10 minutes and then went off. There was no change in the way the engine was running. It did not come on any today. I thought that once the Check Engine light came on it stayed on until reset by the dealer. Anyone have any idea about what might be going on? Thanks, BillyC Quote Link to comment Share on other sites More sharing options...
90LS400Lexus Posted December 11, 2003 Share Posted December 11, 2003 No, they can flash on and off. The initial illumination means something is wrong and it will likely get worse and illuminate more often. I am not 100% sure, but I think there is a way to check the "stored codes". At least I think that is the case on General Motors cars. Quote Link to comment Share on other sites More sharing options...
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