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mike c
mike c, toyota master diagnostic technician
Category: Toyota
Satisfied Customers: 620
Experience:  toyota certified master diagnostic technician ase and hybrid certified
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2000 toyota corolla: check engine light..obd machine came to the code

Customer Question

2000 toyta corolla, check engine light on , from obd machine came to the code as p 0171-- pls advice what to do regds/anis
Submitted: 7 years ago.
Category: Toyota
Expert:  mike c replied 7 years ago.
ok several possibilities here.. the most comon would be a dirty or out of range mass air flow sensor..could be a vacuum leak or fuel relate the p0171 is basically a lean code..
do you have access to a volt/ohmeter for testing?