P0171-p0174
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 1 of 4 1234 LastLast
Results 1 to 15 of 47
Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, P0171-p0174 in Cadillac SRX / XT5 Forums; Recent DTC in stored and pending. MIL came on P0171 system too lean bank 1 P0174 system too lean bank ...
  1. #1
    orandaberg Guest

    P0171-p0174

    Recent DTC in stored and pending. MIL came on
    P0171 system too lean bank 1
    P0174 system too lean bank 2

    Could this be because I installed VT mufflers? Also I have now the madtuner flash so I will be updating my ECM.
    Could the new flash eliminate this? If not the new mufflers what else could cause the DTC. I was driving on the autobahn in Germany.


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    repnatl is offline Cadillac Owners Enthusiast
    Join Date
    Oct 2012
    Posts
    975
    Bank one and two lean together I'd suspect the mass air flow sensor

  4. #3
    orandaberg Guest

    Re: P0171-p0174

    So if I get these same DTC in the future, I can pretty much assume the sensor is out? Would I not get a DTC for that?

  5. Remove Advertisements
    Cadillac Forums
    Advertisements
     

  6. #4
    1BadCadSTS's Avatar
    1BadCadSTS is offline Cadillac Owners Connoisseur
    Automobile(s): 05 STS4
    Join Date
    Nov 2010
    Age
    30
    Posts
    4,224
    Northstar?


    Check the intake manifold bolts. Common problem.

  7. #5
    orandaberg Guest

    Re: P0171-p0174

    Yes Northstar

  8. #6
    RippyPartsDept's Avatar
    RippyPartsDept is offline Cadillac Owners 10000+ Posts
    Join Date
    Sep 2007
    Location
    Wilmington, NC
    Posts
    13,969

    Re: P0171-p0174

    Yeah, loose intake manifold or any other source of extra air (after the Mass Airflow Sensor) will cause both banks lean

  9. #7
    orandaberg Guest

    Re: P0171-p0174

    Whats the N/m for the bolts?
    Answer 10 N·m
    89 lb in

  10. #8
    repnatl is offline Cadillac Owners Enthusiast
    Join Date
    Oct 2012
    Posts
    975
    There are codes for the mass air but typically I look at that with any dual banks being lean but also they are right the v8 had issues with intake bolts backing out some blue loctite will fix that

  11. #9
    orandaberg Guest

    Re: P0171-p0174

    Anyone know the correct head size for the bolts, I used a 10mm but I think it a special head?

  12. #10
    repnatl is offline Cadillac Owners Enthusiast
    Join Date
    Oct 2012
    Posts
    975
    13mm?

  13. #11
    orandaberg Guest

    Re: P0171-p0174

    no thats too high, its 10 but the head of the bolt is not your typical socket head

  14. #12
    orandaberg Guest

    Re: P0171-p0174

    Anyone know the head bolt pattern? MM or US? I am not at home to try and would just like to know if possible before, so when I get home I can just buy ther tool and not have to remove one then compare. I used a 10 mm and to tighten some loose ones but slips off when trying to torque it dowm to 10N-m so it could be US or a different head pattern.

  15. #13
    RippyPartsDept's Avatar
    RippyPartsDept is offline Cadillac Owners 10000+ Posts
    Join Date
    Sep 2007
    Location
    Wilmington, NC
    Posts
    13,969

    Re: P0171-p0174

    sounds like a service manual would be a really really good investment for you

    found a set on ebay for $280 ... i think the new set from the publisher (Helm Inc) costs less than that
    check http://www.helminc.com

  16. #14
    orandaberg Guest

    Re: P0171-p0174

    The bolt pattern is not in the manual or the size, just the torque.

  17. #15
    RippyPartsDept's Avatar
    RippyPartsDept is offline Cadillac Owners 10000+ Posts
    Join Date
    Sep 2007
    Location
    Wilmington, NC
    Posts
    13,969

    Re: P0171-p0174

    i find that hard to believe
    you have a factory manual?

  18. Remove Advertisements
    Cadillac Forums
    Advertisements
     

+ Reply to Thread
Page 1 of 4 1234 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •