OBD Codes

2006 GMC C2500
125,000 MILES
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TRISIB
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  • 3 POSTS
Check Engine light came on while on a cross country trip from New Mexico to SC pulling a 25 ft camper. Fuel consumption was excessive, 7-10 MPG after the light came on. Found the following codes set P0101, P0171 and P0174. Cleared the codes. Any ideas?

Thanks Bill H

Feb 17, 2012 at 1:48 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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.
Feb 17, 2012 at 1:51 AM
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