2005 GMC Truck Trouble code 174

Tiny
REAL ROYER
  • MEMBER
  • 2005 GMC TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 132,000 MILES
Bank 2- 02 sensor has been changed but trouble code keeps comming back. Any other solution for code 174.
Sunday, July 5th, 2009 AT 5:33 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P0171/P0174

A lean fuel condition can be caused by:

* 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)
Was this
answer
helpful?
Yes
No
Sunday, July 5th, 2009 AT 5:56 PM

Please login or register to post a reply.

Sponsored links