Check Engine Light

Asked by GuruWJ9L8 Jun 02, 2018 at 05:23 PM about the 2003 Ford Ranger 2 Dr XLT Extended Cab SB

Question type: Maintenance & Repair

Showing codes PO171 ,172,174,and175
what the heck?

1 Answer

27,570

Lean code at idle is too much air. Maybe a vacuum leak somewhere? Rich is too much fuel or not enough air. I'd use a gage and check proper fuel pressure. How long since a tune-up? Some fords have had problems with maf sensor, Where applicable, with everything off, unplug it, take the vehicle for a spin. If you think it does better, check that system.

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