Results 1 to 13 of 13

Thread: Diagnostic Module Code 19 (on pin 19)

  1. #1
    Junior Member
    Join Date
    Jun 2018
    Posts
    17

    Diagnostic Module Code 19 (on pin 19)

    the car seems to rum well but every 4 trips or so, the check engine light and this code. I did some research and it seems that it could be a problem with the computer not being able to make the mixture correct and the computer might need a new chip to allow this. Kind of a big project.

    Any ideas what else to check to make sure this is the issue.

    This is a Canada car without cats.

    Bill

  2. #2
    .036 Hoonigan™
    E500E Boffin
    gsxr's Avatar
    Join Date
    Dec 2008
    Location
    Boise, ID, USA
    Posts
    22,103

    Re: Code Diagnotics 19-19

    Bill, a few questions...

    1) What year / model is your car?
    2) Where do you live?
    3) What is the part number of the LH module currently in the CAN box?

    Code 19 generally indicates the adaptation level is maxed out, however this usually only affected cars in a certain geographic area. In the meantime, make sure the fuel pressure regulator vacuum hose is connected (and not leaking), and there's no fuel present in the hose. The EPROM swap is straightforward, but if it's not the root cause of your problem, swapping the chip won't be a permanent fix. I have those special chips available if you need one, but I'm not yet convinced it's your problem.


  3. #3
    .036 Hoonigan™
    E500E Boffin
    gsxr's Avatar
    Join Date
    Dec 2008
    Location
    Boise, ID, USA
    Posts
    22,103

    Re: Diagnostic Module Code 19 (on pin 19)

    BTW, the "new chip" is discussed in more detail at the link below, although the information on that page is not entirely accurate (and, it's for 4.2L engines only, not 5.0L, despite what that website says). I'd sell the chip for less than half what he's asking.

    https://www.k6jrf.com/MB_S500.html#DTC-19


  4. #4
    Junior Member
    Join Date
    Jun 2018
    Posts
    17

    Re: Diagnostic Module Code 19 (on pin 19)

    Thank you for your thoughts. I will check more on the vacuum. The car is a 94 from Canada without cats. I am not sure which computer it is. The ones in the cat are
    011 545 97 32 GM
    013 545 39 32
    124 545 40 32 E GAS
    016 545 13 32

  5. #5
    .036 Hoonigan™
    E500E Boffin
    gsxr's Avatar
    Join Date
    Dec 2008
    Location
    Boise, ID, USA
    Posts
    22,103

    Re: Diagnostic Module Code 19 (on pin 19)

    Quote Originally Posted by bill420e View Post
    Thank you for your thoughts. I will check more on the vacuum. The car is a 94 from Canada without cats. I am not sure which computer it is. The ones in the cat are
    011 545 97 32 GM
    013 545 39 32
    124 545 40 32 E GAS
    016 545 13 32
    011 545 97 32 - GM - Power supply
    013 545 39 32 - ASR+ABS
    124 545 40 32 - E-GAS (throttle control)
    016 545 13 32 - LH module (fuel injection / mixture control)

    The "new chip" would be installed in the LH module.

    Not that it matters, but AFAIK there was never a model officially imported to North America without catalysts. If it has no cats, a previous owner would have removed them.


  6. #6
    Junior Member
    Join Date
    Jun 2018
    Posts
    17

    Re: Diagnostic Module Code 19 (on pin 19)

    Maybe is does have cats. I am not sure where they are located exactly.

    I am just north of San Francisco in CA

    1994 car

    I looked at the vacuum line to the fuel pressure regulator. It seems in good shape and OK fit. However, a very strong gas smell in line. I was not able to suck out and further gas or fumes with the car off. It seems to me that the regulation should not be leaking gas fumes into the vacuum line. Again, no liquid, but very strong smell.

    Do you think that replacement of the regulator is appropriate?

    I just noticed something else. 7 of the injectors are red and one is blue.

    Thank you for all the help.

  7. #7
    .036 Hoonigan™
    E500E Boffin
    gsxr's Avatar
    Join Date
    Dec 2008
    Location
    Boise, ID, USA
    Posts
    22,103

    Re: Diagnostic Module Code 19 (on pin 19)

    Pretty likely the car has cats, as you'd never pass emissions testing in CA without them. They are located roughly under the front seats of the car.

    If there was a strong gas smell with the vac hose removed from the FPR, and the FPR is old/original... yes, I would replace it. They are not expensive.

    Apparently one of your injectors was replaced, which is odd... those are rare failures. Maybe one was physically damaged somehow.


  8. #8
    Junior Member
    Join Date
    Jun 2018
    Posts
    17

    Re: Diagnostic Module Code 19 (on pin 19)

    The car continues to run great but after a few trips, the 19 code is back. I did replace the fuel pressure regulator with not difference, but it did seem to leak a bit. I am thinking of checking for vacuum leaks, maybe a small leak at injector seal? The way I used to do this was with starter fluid sprayed around the running engine to see if idle increases. Any better way?

    The code with only be a problem when I need to smog the car in a year and change.

    Any other ideas on this code?

  9. #9
    .036 Hoonigan™
    E500E Boffin
    gsxr's Avatar
    Join Date
    Dec 2008
    Location
    Boise, ID, USA
    Posts
    22,103

    Re: Diagnostic Module Code 19 (on pin 19)

    It wouldn't hurt to check for vacuum leaks. A smoke test would be ideal. A digital scanner to read the adaptation values would pinpoint if that is the root cause of the code 19.

    You could always swap out the chip, click here for photos of what's involved. IF the adaptation values are out of normal range, the chip swap should fix it.


  10. #10
    Site Honcho
    Klugscheisser
    Ich bekenne mich
    nicht schuldig.
    gerryvz's Avatar
    Join Date
    Nov 2008
    Location
    Annapolis, MD
    Posts
    18,351

    Re: Diagnostic Module Code 19 (on pin 19)

    Quote Originally Posted by gsxr View Post
    You could always swap out the chip, click here for photos of what's involved. IF the adaptation values are out of normal range, the chip swap should fix it.
    click where?




  11. #11
    .036 Hoonigan™
    E500E Boffin
    gsxr's Avatar
    Join Date
    Dec 2008
    Location
    Boise, ID, USA
    Posts
    22,103

    Re: Diagnostic Module Code 19 (on pin 19)

    Darn forum ate my homework! vBulletin, grrr....


  12. #12
    Junior Member
    Join Date
    Jun 2018
    Posts
    17

    Re: Diagnostic Module Code 19 (on pin 19)

    How is a smoke test done?

    I have a basic scanner OC1 I think. What do I need to get this value?

    Thank you so much for the help.

  13. #13
    Site Honcho
    Klugscheisser
    Ich bekenne mich
    nicht schuldig.
    gerryvz's Avatar
    Join Date
    Nov 2008
    Location
    Annapolis, MD
    Posts
    18,351

    Re: Diagnostic Module Code 19 (on pin 19)

    A smoke test requires a smoke machine or other means of injecting smoke into the intake system. If there are any air/vacuum leaks in the intake, then you can visually see where the smoke is coming from and remedy the problem. A few folks here have had success smoking a car and blowing the smoke into an intake line (such as the brake booster line), but I recommend going to a mechanic who has a smoke machine, or building/buying one yourself. Much better way to go about it.

    Cheers,
    Gerry

Similar Threads

  1. Diagnostic Module (DM) code 19
    By Stevester 500E in forum De-Coding
    Replies: 24
    Last Post: 07-20-2017, 01:05 PM
  2. Diagnostic Module (DM) failure
    By gsxr in forum Troubleshooting and Diagnostics
    Replies: 2
    Last Post: 05-25-2013, 09:13 PM
  3. MB Diagnostic Trouble Code Reference Guide
    By gerryvz in forum De-Coding
    Replies: 4
    Last Post: 04-22-2013, 06:54 PM
  4. High Idle Speed w/DTC 6 on Diagnostic Module
    By emerydc8 in forum Troubleshooting and Diagnostics
    Replies: 2
    Last Post: 02-07-2013, 03:02 PM
  5. Wanted: Diagnostic Module- the one in the dash!
    By samiam44 in forum Wanted to Buy
    Replies: 0
    Last Post: 01-12-2012, 09:11 PM

Bookmarks

Posting Permissions

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