Mechanics

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, IS IT LI

2000 Ford F-150 • 202,000 miles

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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Doash1988
February 29, 2012.




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.

Rasmataz
Feb 29, 2012.


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