check engine light
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Ask Your Question2002 Toyota Corolla
Question: toyota corolla 2002 code p0171
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Best Answer
bmdouble January 28, 2013, 15:11Reply
Journeymanpo171-bank 1 system lean.Start by checking for vacuum leaks.Don't fall for the oxygen sensor diagnosis that many parts stores have told many of my customers.9 times out of 10 it is a vacuum leak.
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Answer #2
cntsmith January 29, 2013, 05:09ReplyRookiein agreement w/ bmdouble as most likely-will add contaminated maf sensor/restricted fuel filter as other possibilities if no vacuum leaks are found.
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