Mechanics

BUICK PARK AVENUE FUEL PRESSURE PROBLEM

1999 Buick Park Avenue • 20,000 miles

How do I fix PO171 (System too Lean)?
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Guest
October 20, 2012.



Bank 1 lean.

Could be a vacuum leak, low fuel pressure, pcv valve or bad mass air flow or map sensor.

Roy

ASEMaster6371
Oct 20, 2012.