CEL on getting codes of running too lean.
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  • 2 Post By curtc
Cadillac STS Forum - 2005 through 2012 Discussion, CEL on getting codes of running too lean. in Past Cadillac Vehicle Discussion; It doesn't feel like nothing is wrong with it. I just want to know how bad it is for my ...
  1. #1
    Jneedom14 is offline Cadillac Owners Member
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    CEL on getting codes of running too lean.

    It doesn't feel like nothing is wrong with it. I just want to know how bad it is for my car and how can I fix it.

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    Guy.Seminerio is offline Cadillac Owners Connoisseur
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    Re: CEL on getting codes of running too lean.

    it's probably not detrimental to the health of your car. I'm guessing your post means it doesn't feel like anything is wrong. I'm a perfectionist so I'd get it fixed. I don't know of any long term issues you can run into leaving this alone. There is always the band aid approach of putting higher octane gas in the car.

  4. #3
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
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    Re: CEL on getting codes of running too lean.

    If you have the Northstar check your intake manifold bolts...They are known to loosen.
    doowap57 and nwjones18 like this.
    Past Cadillac's

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  5. #4
    Ludacrisvp's Avatar
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    Re: CEL on getting codes of running too lean.

    Quote Originally Posted by curtc View Post
    If you have the Northstar check your intake manifold bolts...They are known to loosen.
    just don't over tighten them ... they are hardly past finger tight ... 89 INCH LBS is spec.

  6. #5
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: CEL on getting codes of running too lean.

    Check the intake manifold bolts.
    Don't mess with Binky Bear!


  7. #6
    Jneedom14 is offline Cadillac Owners Member
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    Re: CEL on getting codes of running too lean.

    Now after driving it today at idle it starts to get rough but anytime above idle its perfect. What could this be? I just got it out the shop for HG and a valve job so im not trying to do any damage cause this car has to last me another year. And I an still running lean on both banks what could cause it to run lean.

  8. #7
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
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    Re: CEL on getting codes of running too lean.

    Quote Originally Posted by Jneedom14 View Post
    And I an still running lean on both banks what could cause it to run lean.
    Have you inspected the intake manifod bolts yet as recommended by more than one of us???? That WILL cause both banks to run lean....
    Past Cadillac's

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  9. #8
    dkozloski's Avatar
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    Re: CEL on getting codes of running too lean.

    What year is this pig?
    Don't mess with Binky Bear!


  10. #9
    1BadCadSTS's Avatar
    1BadCadSTS is online now Cadillac Owners Connoisseur
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    Quote Originally Posted by Jneedom14
    Hi I have a problem and I want you to help but ill be completely general and vague in providing you any information to help...
    Fixed

    Year make model engine size would go a long way towards helping us help you. Also a stop by an auto parts store and getting the codes scanned and then giving a us those codes would be nice...

    Help me help you. HELP ME HELP YOU!

  11. #10
    Jneedom14 is offline Cadillac Owners Member
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    Re: CEL on getting codes of running too lean.

    It's a 2006 Cadillac STS V8 4.6l I don't remember the codes they were just bank 1 too lean and bank 2 too lean. Please help I apologize for not giving ample information.

  12. #11
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
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    Again, there's a good chance those lean codes are being set by loose intake manifold bolts...Have them inspected or check them out yourself...
    Past Cadillac's

    2004 CTS 3.6L - 2011-2012
    2001 Seville Touring Sedan - 2006-2011
    1995 Seville Touring Sedan - 2005-2006

  13. #12
    dkozloski's Avatar
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    Re: CEL on getting codes of running too lean.

    Check the intake manifold bolts. Try it. You'll like it.
    Don't mess with Binky Bear!


  14. #13
    1BadCadSTS's Avatar
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    Intake manifold bolts or the tb plenum gasket.

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