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2002 Chevy Tahoe diagnostic code p01701

Tiny
TIFFANY RUSSO
  • MEMBER
  • 2002 CHEVROLET TAHOE
Engine Performance problem
2002 Chevy Tahoe V8 Two Wheel Drive Automatic

my check engine light is on and the diagnostic reader says running lean bank one what is the problem?
Friday, April 18th, 2008 AT 11:52 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You probably meant P0171 see below

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)
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Friday, April 18th, 2008 AT 12:07 PM

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