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Posted on Nov 25, 2010
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What does it mean when your bank 1 n bank 2 are running lean

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Bruce Bracey

Bruce Bracey

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  • Posted on Nov 25, 2010
Bruce Bracey
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A lean bank 1 and 2 is indicating there is not enough fuel being injected to support proper combustion.
Leading causes can include but are not limited to......
1) low fuel pressure or plugged fuel filter.
2) vacuum leak causing lean condition.
3) air intake hose or crank case not sealed properly and bypassing the MAF sensor or the MAF sensor element is dirty.
4) wrong fuel or poor quality fuel used.
Hope this helps. If the Service Engine Soon light is illuminated, there will be fault codes associated the light. Get the vehicle scanned for free at your local Auto Zone or Advanced Auto and report back.

  • 3 more comments 
  • hurlygurl30 Nov 25, 2010

    I had it checked n that's what they told me but they want to charge alot for the bank 1n bank 2 the codes were P0171 P0174 P1516

  • Bruce Bracey
    Bruce Bracey Nov 26, 2010

    What is thier proposed fix for the lean bank 1 and 2?

  • hurlygurl30 Nov 28, 2010

    Tune up an air flow sensor

  • Bruce Bracey
    Bruce Bracey Nov 29, 2010

    If all I stated in my original solution has been checked and there conclusion was a tune up and a mass air flow sensor replacement, then it is possible that may take care of the problem.
    Good luck.

  • hurlygurl30 Nov 30, 2010

    I have a girl question what is the RPM go up to when you take off after being at a complete stop Nan what is to high???

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