CHECK ENGINE LIGHT/ ERROR CODE P0171

2003 Ford Ranger

Tiny

michael.b.fritz

February, 13, 2010 AT 6:22 AM

Engine Performance problem
2003 Ford Ranger 6 cyl Two Wheel Drive Automatic 61000 miles

Is there a simple fix to this code or a general fix on Rangers with this code? I live in Germany and really don't have alot of resources.

FOUND 16892 RELATED QUESTIONS

1 Answer

Tiny

rasmataz

February, 13, 2010 AT 6:30 AM

P0171 Lean A/F mixture

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (Use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (Try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)

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