2001 Lexus IS 300 Engine Codes PO171 & PO174

  • 2001 LEXUS IS 300

Engine Mechanical problem
2001 Lexus IS 300 6 cyl Two Wheel Drive Automatic 120000 miles

My lexus is reading a PO171 & PO174 but does not have any symptoms, runs fine. Might this be due to putting low octane. Car has no vacum leak or exhaust leak.

Do you
have the same problem?
Thursday, February 18th, 2010 AT 10:05 PM

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