2000 Toyota Corolla check engine light

Tiny
APPAPEN
  • MEMBER
  • 2000 TOYOTA COROLLA
2000 Toyota Corolla 127000 miles

it has a P0171 (fuel lean mixture) code. It has some pinging during load when using regular fuel.

Has no vaccum leak, the fuel fitler in internal in the tank.

any advise what it could be?
Saturday, June 19th, 2010 AT 8:10 AM

1 Reply

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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Saturday, June 19th, 2010 AT 9:24 AM

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