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Old 06-13-2004, 08:58 AM
Mazda Newbie
Join Date: Jun 2004
Posts: 1


I have mazda protege 2000 car runs good but check ingine light came I checked
and I get P0171 code mixture too lean. I dont know what does it means
have I replace air flow sensor or air filter?
how can I check that air flow sensor is still good?
I have cleared the code but check ingine light did not come again

thanks for help
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Old 06-14-2004, 01:44 AM
Mazda Tech's Avatar
Mazda Newbie
Join Date: May 2004
Posts: 56

Most of the time P0171 will set if air flow meter gets contaminated by dirt or oil.
You should first make sure there are no vacuum leaks. I have diagnosed this code many times and 95% of the time I have to replace the flow meter Mazda dose offer a rebuilt unit and some car's are covered under 7 year 70,000 mile warranty.
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