2003 Chevy Suburban check engine lite

Tiny
PETEMARTINEZ
  • MEMBER
  • 2003 CHEVROLET SUBURBAN
  • V8
  • 2WD
  • AUTOMATIC
  • 85,000 MILES
Engine runs rough. Hard start in am. P0101, 10171, p0174 codes are stored in memory. What is the common problem.
Sunday, March 15th, 2009 AT 9:27 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P0101 mass airflow sensor problem could be it also see below

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)
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Monday, March 16th, 2009 AT 4:52 AM

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