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2000 Ford Windstar lean codes in bank 1 and 2

Tiny
HCASTEEL
  • MEMBER
  • 2000 FORD WINDSTAR
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 145,000 MILES
What is the most common cause for this van to have banks 1 and 2 lean? I have replaced o2 sensors, vacuum lines, and cleaned out intake with sea foam. I have had in shop 5 times and I get the same thing every time I get it back. After 2 days I get the codes right back after spending up to $100.00 at a time. Can you please help me with this issue?
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Friday, June 4th, 2010 AT 6:39 PM

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.
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Friday, June 4th, 2010 AT 7:00 PM

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