toyota corolla 2002 code p0171 on 2002 Toyota Corolla

check engine light

by in Houston, TX on January 28, 2013
2 answers
ANSWER by on January 28, 2013
po171-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.
ANSWER by on January 29, 2013
in 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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