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1998 LEXUS ES 300
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KITZKATT
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  • 1 POST
I have a 1998 Lexus ES300. The code showing up is P0171 – System too Lean (Bank 1). What does it mean?
Apr 16, 2011 at 11:01 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
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.
Apr 16, 2011 at 1:31 PM
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