What is your question?
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What is your question?
After clearing the code it come back on at about 30 to 40 miles
What makes this problem better or worse?
NO
How long has your 2006 Ford Freestyle had this problem?
Along time
1 Reply
https://www.engine-codes.com/p0171_ford.html Possible causes Intake air leaks Faulty front heated oxygen sensor Ignition misfiring Faulty fuel injectors Exhaust gas leaks Incorrect fuel pressure Lack of fuel Faulty Mass Air Flow (MAF) sensor Incorrect Positive Crankcase Ventilation (PCV) hose connection