Mechanics

OBD CODES

2006 GMC C2500 • 125,000 miles

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

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Trisib
February 17, 2012.



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.

Rasmataz
Feb 17, 2012.