1999 Ford Explorer Repair process

1999 FORD EXPLORER

12,400 MILES • 6 CYL • 4WD • AUTOMATIC

BILLDAVIS

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My check engine light came on. I had it scan and the code return PO171 which means my system is too lean.
What does that mean, and how is this problem repaired?

Oct 10, 2008 at 4:42 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.