code 12,41,42
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

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
Results 1 to 4 of 4
5.0 and 5.7 Discussion, code 12,41,42 in Cadillac Engine Technical Discussion; my car recently started bucking and chugging really bad lately, so I ground te terminals and this is what i ...
  1. #1
    89fatb's Avatar
    89fatb is offline Cadillac Owners Fanatic
    Automobile(s): 1989 fleetwood brougham 145k
    Join Date
    Dec 2004
    Location
    Oconomowoc, WI
    Age
    33
    Posts
    116

    code 12,41,42

    my car recently started bucking and chugging really bad lately, so I ground te terminals and this is what i found any help would be appreciated.......code 12,41,42

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    90Brougham350's Avatar
    90Brougham350 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 FWB, 93 SDV, 94 FWB (sold), 90 Brougham (sold)
    Join Date
    Jan 2005
    Location
    River Falls, WI
    Age
    29
    Posts
    3,730

    Re: code 12,41,42

    Not sure if I'm leading you in the right direction, but I was getting code 42 up the ass when my knock sensor hit the fritz. However, that's a TBI Chevy motor, I don't know if the codes are the same for a carbed Olds.

  4. #3
    joe_padavano is offline Cadillac Owners Member
    Automobile(s): 93 Allante
    Join Date
    Mar 2006
    Location
    Northern Virginia
    Posts
    78

    Re: code 12,41,42

    Quote Originally Posted by 90Brougham350 View Post
    NHowever, that's a TBI Chevy motor, I don't know if the codes are the same for a carbed Olds.
    They're not. Code 12 is normally the code that indicates the computer is working, however if Code 12 sets when the engine is running it indicates a loss of distributor reference signal to the ECM. Code 41 will usually set simultaneously with Code 12. This could be either a bad wire on circuit 430 (the purple/white wire from the distributor to the ECM) or a bad HEI module. Code 42 will set if there is an open or ground in two of the other wires between the distributor and the ECM. It almost sounds like the four-pin connector to the distributor is loose or corroded. Failing that, it could be a bad module. The factory service manual has specific troubleshooting charts for all three codes.

  5. #4
    89fatb's Avatar
    89fatb is offline Cadillac Owners Fanatic
    Automobile(s): 1989 fleetwood brougham 145k
    Join Date
    Dec 2004
    Location
    Oconomowoc, WI
    Age
    33
    Posts
    116
    Thread Starter

    Re: code 12,41,42

    finally figured it out after trying a ignition module....damn it was an ECM and double checked the timing just for the heck of it. it was a little off, that dist. hold down bolt is a real pain to get to. now the idle seems a little low, oh well

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

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

Please enter a valid email address for yourself.

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
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting