Eric Cheung Posted October 1, 2004 Share Posted October 1, 2004 I did a HAVC diagnostic on my 97 ES300 according to the instruction in the FAQ. The LCD showed code 21 and was blinking. What does the it mean? Thanks! Quote Link to comment Share on other sites More sharing options...
SKperformance Posted October 2, 2004 Share Posted October 2, 2004 Isn't the detiled list right under ti for the explaination? Let me know if it isn;t but it means your sensor on the dash ,the little red bulb is not getting any light so it is not sure if it is dark or not working. Quote Link to comment Share on other sites More sharing options...
Eric Cheung Posted October 2, 2004 Author Share Posted October 2, 2004 Thanks for the explanation. I could not find the explanation in the FAQ, but found another post that showed very detailed explanation of all the trouble codes after I submitted the question. Thanks! Quote Link to comment Share on other sites More sharing options...
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