Diagnostic Module (DM) code 19

[Stevester 500E]

Dm code 19 states there is a fuel injector open/short circuit or lh reached adaptation limit.
Let's assume I don't have an upgraded harness.
this code 19 reappears after a 15 minute drive.
Car is running lean. So I imagine an open injector could cause this?
If the car was scanned, with live data, would it show which injector is open or short circuited?

 

[gsxr]

Re: dm code 19

This is MOST likely that the LH adaptation values are outside the range the DM is happy with. If you had a bad / open / shorted / whatever injector, the engine would misfire, run rough, and lack power. If the car is running lean, it's a safe bet it's lean enough for the DM to trigger code 19. You sure the FPR is good, and the LH module has the correct chip inside?

You need a digital scanner that will show LH adaptation values. I'd highly recommend forking out the $500 for a turn-key SDS kit including the laptop and software installed ready to use. On a tight budget you could get a used Snap-On MT2500 kit piecemeal but it may take weeks or months to get all the appropriate pieces required cheap enough and it may still cost $200-$300, for maybe 50% of the functionality you get with SDS.

 

[Stevester 500E]

Re: dm code 19

Preface:
I have bypassed the car's security system by disconnecting it and looping the figure 8 around relay behind the cluster.
I have an intermittent vacuum lock issue with my drivers side rear door.
When I open the door with the key, I here a soft bussing noise under the passenger back seat that buzzes for about 30 seconds or so.

I take the car for a 15 minute drive and the dm code 19 keeps coming back.
When I open the hood to check the codes with the key turned all the way right, I hear a buzzing sound from underneath the intake air box area.

I am not sure where to begin with trying to figure out what is causing the DM Code 19.

 

[Stevester 500E]

Re: dm code 19

...You sure the FPR is good, and the LH module has the correct chip inside?..

I am not sure that the FPR is within spec. That is my next item to install. I have a brand spanking new one in the box.

I am not sure what chip is inside the LH Module. I do have a spare non-WOT module, somewhere.... I can find plenty of WOT modules in my spare parts bin, but the one I need in MIA. Once I find my non-WOT LH Module, it's going in.

 

[Stevester 500E]

Re: dm code 19

Great, I found the LH 014 545 6232 module that I once thought had WOT.
I hope it really doesn't have WOT enrichment and is truly close loop.
I am going to pop in the module first. Drive it and see if the code comes back.
If that doesn't solve the problem, then the FPR will go in.
And it the doesn't do it, then goes in the 02 Sensor.
And if that doesn't solve it.....I will scratch my head for a little while.....

 

[Stevester 500E]

Re: dm code 19

UPDATE:
The module that was originally in my 1993 Mercedes 500e is part number 014 545 6532 date code 92M07 and was running into adaption issues-reaching adaptation limits.

I installed an LH Module with part number 014 545 6232 date code 92M05.
Fingers crossed, but so far it is adapting quite nicely. I have driven it approximately 70 miles.
Beside that I haven't triggered an adaptation limit fault code, the car is also performing better.

As stated by others, while the classic sign of a failing LH module is the clicking sound, they fail in other ways too.
I am so glad I had a spare one on hand.

Well, there is forward progress...Thanks for the help.

The more I have these experiences with my car, the more I think I should have doubles of every "part we should stock up on".
LH Modules, other modules, EZL's, ETA's....

 

[gsxr]

Re: dm code 19

Uh... I wouldn't get too excited just yet. 014-545-62-32 is a 4.2L module according to the EPC, despite the 5.0L on the label. I don't know which is correct, only way to tell would be reading the EPROM code and determining if it has fuel mapping for 4.2L or 5.0L. If your previous 5.0L module was running the engine lean for whatever reason, it makes sense that installing a 4.2L module would not cause code 19. If so, your problem isn't fixed, all it did was make the DM code go away. You could just as easily remove the CEL bulb. And if it's a 4.2 module, you'll be down on power 20% or so.

Again, the ONLY way to tell what is happening is to get a digital scanner and view the adaptation values! I don't know how many times I have to repeat this...

 

[Stevester 500E]

Re: dm code 19

Uh... I wouldn't get too excited just yet. 014-545-62-32 is a 4.2L module according to the EPC, despite the 5.0L on the label. .....

Again, the ONLY way to tell what is happening is to get a digital scanner and view the adaptation values! I don't know how many times I have to repeat this...

I am very exited still. 014-545-62-32 part number is for both a 5.0 module and a 4.2 module-yes, and EPC error. I have not lost any power, I have gained power.

I don't have a scanner to view the adaptation values, which I know is very important to my situation.
I count it as a victory to not have reached adaptation limits.

 

[gsxr]

Re: dm code 19

If you have an engine problem that is causing the 5.0L computer to try and reduce fuel delivery... and you put in a module that reduces fuel delivery... that is not a victory!! All you did was make the CEL go away.

Also, based on a number of eBay listings, I am almost certain the EPC is correct and the error is on the module label. I need to check at home and see if I have one of these modules in my collection, and if so, check out the EPROM code to see what is going on. All the eBay listings for your 'new' module state they were removed from a W140 with 4.2L engine. Again, the digital scanner will show if the module is for 4.2L or 5.0L displacement, regardless of what the label says.

If your 5.0 is running better with a 4.2 module, you have even bigger problems...

 

[Stevester 500E]

Re: dm code 19

http://www.500eboard.com/forums/showthread.php?t=5127&p=74581&viewfull=1#post74581
post #58

014-545-62-32 is from a W140 with 4.2L 5.0L engine, circa 1993, and does not have WOT enrichment.

 

[Stevester 500E]

Re: dm code 19

http://www.ebay.com/itm/92-95-MERCE...ash=item489ed568c3:g:MWMAAOSwUKxYbA9g&vxp=mtr

 

[Stevester 500E]

Re: dm code 19

If you have an engine problem that is causing the 5.0L computer to try and reduce fuel delivery... and you put in a module that reduces fuel delivery... that is not a victory!! All you did was make the CEL go away.

Again, the digital scanner will show if the module is for 4.2L or 5.0L displacement, regardless of what the label says.

If your 5.0 is running better with a 4.2 module, you have even bigger problems...

Agreed, but I don't believe that I put in a 4.2 module.
I am still optimistic, but a digital scanner is the only way to be certain, 100%.
Agreed, we can't 100% trust Mercedes parts labels. In this cases, Mercedes used two labels with part same part numbers, one that is labeled 5.0 and one labeled 4.2.
It is a little comforting, but the 5.0 module was pulled from a 5 liter car, but still, won't know until scanner is hooked up to my car.

 

[gsxr]

Re: dm code 19

http://www.500eboard.com/forums/showthread.php?t=5127&p=74581&viewfull=1#post74581
post #58

I believe I edited that old post based on the module label (per later post #81). However I am no longer certain the label is accurate. Need to confirm what's up with that p/n. I am confident that MB did not use the same part number in both 4.2L and 5.0L engines.

http://www.ebay.com/itm/92-95-MERCE...-CONTROL-MODULE-W140-0145456232-/311902431427

Note that auction does not state what year/model the module was removed from. It appears the seller is basing the description on the label, which is already suspected to be wrong.

The odds are not in your favor... I stopped after the first six I found:

400SEL:
http://www.ebay.com/itm/222192181866

400SEL:
http://www.ebay.com/itm/182171289147

400SE:
http://www.ebay.com/itm/322064446631

400SE:
http://www.ebay.com/itm/152625167539

400SEL:
http://www.ebay.com/itm/311686820973

400SE:
http://www.ebay.com/itm/262242495369

 

[gsxr]

Re: dm code 19

Bad news, Stevester. I had a 014-545-62-32 module at home and read the EPROM code. It's a 4.2L program/module. The label on the module is incorrect. If you connect a digital scanner to a car with this module, it will show 4.2L as well. I'll update the old thread to clarify.

Sorry.

 

[gerryvz]

Re: dm code 19




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[Stevester 500E]

Re: dm code 19

ok, I am suing MB....
In all seriousness, if MB mislabeled then installed them on cars, they causes trouble either way.
So a mechanic pops open the can box of a stock 4.2 car, sees a mislabeled 5.0 module. He then says to the owner, you have the wrong module in your car !
So the assembly line has all these mislabeled 5.0 modules stacked on an assemblers bench, they get installed into many 5.0 liter cars.
Then these cars which need 5.0 fuel mapping, actually get 4.2 liter mapping....putting in a module that reduces fuel delivery !
Big problems !

So how many cars were assembled with the incorrect LH Module?

Bad news, Stevester. I had a 014-545-62-32 module at home and read the EPROM code. It's a 4.2L program/module. The label on the module is incorrect. If you connect a digital scanner to a car with this module, it will show 4.2L as well. I'll update the old thread to clarify.

Sorry.

 

[Stevester 500E]

Re: dm code 19

So you are a guy shopping for a 5.0 liter LH module, your see one that is labeled as a 5.0 with a part number of 014 545 6232, you are SOL if you buy it?
Are there other mislabeled modules out there, that were mislabeled from the factory?
FYI, my car is ru trnning great with that module installed. It's not so much that the CEl is not triggering, it's that it is running great !
So if it is indeed a 4.2 module, then 4.2 LH modules work just fine in a 5.0.

 

[Stevester 500E]

Re: dm code 19

And is the eprom a non wot eprom too?

Bad news, Stevester. I had a 014-545-62-32 module at home and read the EPROM code. It's a 4.2L program/module. The label on the module is incorrect. If you connect a digital scanner to a car with this module, it will show 4.2L as well. I'll update the old thread to clarify.

Sorry.

 

[Stevester 500E]

Re: dm code 19

ok.. ...another 5.0 WOT module going in to see what happens.
No scanner at this point, just butt dyno for now......

 

[Stevester 500E]

Re: dm code 19

Pics or it didn't happen...

Bad news, Stevester. I had a 014-545-62-32 module at home and read the EPROM code. It's a 4.2L program/module. The label on the module is incorrect. If you connect a digital scanner to a car with this module, it will show 4.2L as well. I'll update the old thread to clarify.

Sorry.

 

[gerryvz]

Re: dm code 19

Pics or it didn't happen...

#sigh
#facepalm
#dualfacepalm

 

[gerryvz]

Re: dm code 19

just butt dyno for now......

Definitive & highly accurate data source.

 

[Stevester 500E]

Re: dm code 19

Interesting, none of these links actually shows the label showing the 4.2.
One is marked out.
I have seen both a 4.2 and a 5.0 LH with the same part numbers, so I do know they exist.

I believe I edited that old post based on the module label (per later post #81). However I am no longer certain the label is accurate. Need to confirm what's up with that p/n. I am confident that MB did not use the same part number in both 4.2L and 5.0L engines.



Note that auction does not state what year/model the module was removed from. It appears the seller is basing the description on the label, which is already suspected to be wrong.

The odds are not in your favor... I stopped after the first six I found:

400SEL:
http://www.ebay.com/itm/222192181866

400SEL:
http://www.ebay.com/itm/182171289147

400SE:
http://www.ebay.com/itm/322064446631

400SE:
http://www.ebay.com/itm/152625167539

400SEL:
http://www.ebay.com/itm/311686820973

400SE:
http://www.ebay.com/itm/262242495369

 

[gsxr]

Re: dm code 19

So how many cars were assembled with the incorrect LH Module?

Production would be based on part number, not the descriptor on the label. I would presume that extremely few cars left the factory with the wrong module (just an incorrect label). Yes, the label could cause issues if an eagle-eye mechanic spotted it. Again, this only affects 1993-vintage W140's with 4.2L engine. Nothing else.

And is the eprom a non wot eprom too?

Correct, this module does not have WOT enrichment.

I have seen both a 4.2 and a 5.0 LH with the same part numbers, so I do know they exist.

I'd love to see a photo of this module with the 4.2L marking, including the date code. It's possible that Bosch caught their label error mid-production and corrected it. If so, later modules with this p/n could have the correct description on the label.

 

[Stevester 500E]

I saw one on eBay. I was thinking along the same lines.
I wanted to figure out when the correction was made to the label, etc.