2bears Posted April 15, 2004 Share Posted April 15, 2004 What is code PO171? My 2000 RX300 engine light came on at 46000 miles. What to look for?? Quote Link to comment Share on other sites More sharing options...
dgorrie Posted April 15, 2004 Share Posted April 15, 2004 Doa search in Google for "P0171 code" and you will see several articles. The P0171 code apparently means "System Too Lean (Fuel Trim)". Thsi could be a bad Mass Air Flow sensor (MAF), or could just be an air leak caused perhaps by an air hose that got knocked loose. The MAF woild be expensive to replace, but you should have a full warranty up to 50,000 miles. So I suggest just taking it to the dealer. That way, you don't have to guess about it, and they have it on their records that you brought it in for that code if it shows up again. In some of the Internet articles, folks cleared the code and it never came back. I had a different code on my 1999 RX300 that came and went -- strange things happen sometime. Doug Quote Link to comment Share on other sites More sharing options...
2bears Posted May 5, 2004 Author Share Posted May 5, 2004 :D Thanks dgorrie, Carried my Rx300 to the dealer and the po171 code was fixed by replacing the maf sensor as you suggested. Warranty covered it. Thanks! Quote Link to comment Share on other sites More sharing options...
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