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Ben
Ben asked in Cars & TransportationMaintenance & Repairs · 5 years ago

Ford Ranger p0171 code?

I have a 97 2.3 liter ranger with the p0171 code. It idles rough when I'm driving between 30 and 45 mph. I changed the front o2 sensor and it didn't fix the problem. Any idea of what it is before I take it to have it looked at? I also checked the hoses and didn't see any cracks.

3 Answers

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  • thebax2006
    Lv 7
    5 years ago

    Bad intake gasket causing a vacuum leak.

    Bad MAF sensor

    Source(s): Mitsubishi Master Tech
  • Anonymous
    5 years ago

    A weak fuel pump or clogged injectors is the likely cause. See a mechanic with a scan tool and check fuel trims and check fuel pressure and fuel flow rate.

  • J E T H R O
    Lv 7
    5 years ago

    http://www.aa1car.com/library/ford_lean_codes.htm

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