greek271 Posted January 14, 2006 Share Posted January 14, 2006 Ok guys maybe you can help. Here is my problem. My lexus is showing the "code p0171 Bank #1 too lean". I know it is the oxygen sensor, but I don't know which one to replace. Is it the front, back??? How do i figure this out? Thanks, Kris Quote Link to comment Share on other sites More sharing options...
Martin Tran Posted January 25, 2006 Share Posted January 25, 2006 Ok guys maybe you can help. Here is my problem. My lexus is showing the "code p0171 Bank #1 too lean". I know it is the oxygen sensor, but I don't know which one to replace. Is it the front, back??? How do i figure this out? Thanks, Kris My car threw the exact same code, and it was due to a dirty MAF sensor. Clean the MAF with some electrical contact cleaner - I had to clean mine twice. The code hasn't reappeared in 2 months. Quote Link to comment Share on other sites More sharing options...
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