ENGINE CODES PO171 & PO174

2001 Lexus IS 300

Tiny

jiquilpeno

February, 18, 2010 AT 10:05 PM

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.

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