LEAN IN BANK 1 AND BANK 2

  • Tiny
  • doash1988
  • 2000 Ford F-150
  • 202,000 miles

I have a check engine light on and the code I got is a system too lean in bank 1 and bank 2, I cleaned the MAF and both banks 1 and 2 sensor 1 straightened out but sensor 2 on both are very sluggish and tend to stay toward the.2 or less voltage.

Bank 2 sensor 2 stays almost continuously below.2v and bank 1 sensor 2 will go above.2v but when below.2v takes a very long time to climb above.2 on the order of 20-30 sec.

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Wednesday, February 29th, 2012 AT 12:23 AM

1 Reply

  • Tiny
  • rasmataz
  • Member

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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Wednesday, February 29th, 2012 AT 12:34 AM

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