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About Illume

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    New Club Member

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  • Lexus Model
    RX 300
  • Lexus Year
  • Location
    Illinois (IL)
  1. Hey guys, 2000 RX300 and long story short, I have been clearing a bunch of codes by replacing things like knock censor, MAF sensor, coils in order to be able to pass emissions test. I have one code left, P0171. I know this is typically the MAF, but since I just put a new one in, I can only think of the O2 sensors that are left. Of the Bank 1 sensors, is one more common to fail than the other? Is there any way to tell which one needs replacement? Or do I do whichever is easier and cross my fingers? Thanks in advance.