1996 Ford F150 check engine light

1996 FORD F-150
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BEVERLYHOOTEN
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Engine Mechanical problem
1996 Ford F150 6 cyl Two Wheel Drive Manual

the codes are P0171, and P0174. what are they and how do you fix it.
Jul 1, 2010 at 1:19 PM
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BLUELIGHTNIN6
  • ✓Experienced Mechanic
  • 16,542 POSTS
need to replace your vehicle's oxygen sensors
Jul 1, 2010 at 1:30 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Lean fuel condition could be caused by one of the following below:

1.Vacuum leaks
2.EGR and PCV valve.
3.Low fuel pressure.
4.Dirty fuel injectors.
5.Mass Air Flow Sensor.
6.Oxygen Sensor.
Jul 1, 2010 at 1:31 PM
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