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Engine code: p0171
1999 Ford Contour

Engine Code: P0171

(1999 Ford Contour)
What are the possible causes of the code?
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Popular Answer
on May 27, 2010
The OBD II P0171 means the Fuel System is too Lean (Bank 1). Your vehicle's computer registered a fault in the emission system. It detected abnormal levels of oxygen in the exhaust. For much more information please refer to this very interesting article in the Encyclopedia; http://repairpal.com/OBD-II-Code-P0171-and-P0174
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General Diagnosis
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on May 27, 2010
The OBD II P0171 means the Fuel System is too Lean (Bank 1). Your vehicle's computer registered a fault in the emission system. It detected abnormal levels of oxygen in the exhaust. For much more information please refer to this very interesting article in the Encyclopedia; http://repairpal.com/OBD-II-Code-P0171-and-P0174
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