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1996 Chevy S-10 PO171 code

Tiny
DAVE DEL
  • MEMBER
  • 1996 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • MANUAL
  • 146,000 MILES
I have been experiencing a problem with my 96 S-10,
I put a scanner on it and got a PO171 code. What is the next step in repairing it?
Friday, April 25th, 2008 AT 9:58 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P0171 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 25th, 2008 AT 10:07 PM
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
You have to test your oxygen sensor on bank one, says that its too lean. Which means you have a weak oxygen sensor.
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Friday, April 25th, 2008 AT 10:08 PM

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