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2000 Toyota Corolla Code 0171

Tiny
TONSAECHIN
  • MEMBER
  • 2000 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 17,300 MILES
Hi,

I have a check engine light on with code p0171. I took it to autozone they said my car is not getting enough fuel, more of air than fuel. Also my engine is making some noise when I first start it on. I have a little bit of rattling sound. I'm trying to find out what cause it so I can fix it. Please let me know thanks.
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Thursday, October 28th, 2010 AT 11:20 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 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.
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Friday, October 29th, 2010 AT 1:01 AM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
P0171 indicates a lean condition bank one upstream O2 sensor.

This could be an O2 sensor, or a bad injector, low fuel pressure etc.

If original sensor, I would replace it and erase code.
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Friday, October 29th, 2010 AT 5:54 AM

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