Service Engine soon light

Tiny
JIMP_PATTY
  • MEMBER
  • 1996 BUICK ROADMASTER
  • V8
  • AUTOMATIC
  • 150,000 MILES
1996 Buick Roadmaster wagon 5.7 liter engine. Service engine light came on - diagnosed as P0174 bank 2 system too lean. What could be wrong?
Friday, July 29th, 2011 AT 9:37 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

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.
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Friday, July 29th, 2011 AT 9:43 PM

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