Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-02-2003, 02:31 AM
Registered User
 
Join Date: Apr 2001
Posts: 146
W124 check engine light/pulling codes

Hello. Tonight the check engine light came on on my 1993 300E. I searched around a bit in the ShopForum, and think I figured out how to pull the codes. I fired up the engine, pushed the button, and the LED flashed once. No fault.

Am I pulling the code the proper way? And if so, what else should I do to figure out what's causing the light to come on?

Thanks,
Mike
Reply With Quote
  #2  
Old 08-02-2003, 10:54 AM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
Turn key ON

Hold button [ led will light when holding ] for 2-3 secs - release

The first stored Code will flash back -write it down

Do above sequence after each code flash until the codes [ if there are more than 1 stored] have returned to the first code ... They will come in numerical sequence .. 3,5,7,8,etc.......

You have to have at least one code stored or the CE would
not be on....

Last edited by Arthur Dalton; 08-02-2003 at 02:41 PM.
Reply With Quote
  #3  
Old 08-02-2003, 04:50 PM
Registered User
 
Join Date: Apr 2001
Posts: 146
I did exactly that, and got no flashes -- the LED lit up as I was holding it down, and after I let it go, nothing happened. Any ideas?

Thanks,
Mike
Reply With Quote
  #4  
Old 08-02-2003, 06:28 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
Is the CE on???
Reply With Quote
  #5  
Old 08-02-2003, 07:26 PM
Registered User
 
Join Date: Apr 2001
Posts: 146
Yes, the light is still on.
Reply With Quote
  #6  
Old 08-02-2003, 07:31 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
Retry the led/sw , holding for both 2-3 and 3-4 secs. with key in the on position...

There should be a code stored or you would not have a CE .. unless you are having a wire harness issue ???

The led is lighting when you hold the button, correct???
Reply With Quote
  #7  
Old 08-02-2003, 07:41 PM
Registered User
 
Join Date: Apr 2001
Posts: 146
OK, I just went out to the car again. Key in on position. I pushed the LED (which lights up when I push it) for 2-3 seconds, 3-4 seconds, 5-6 seconds. I noticed something else I hadn't before -- after letting go of the button, there's a very faint flash of the LED (just once).

I also noticed there was a clip loose on the part that connects the air box to the tube that goes across toward the back of the engine. Could this have been causing the problem? The light is still on; don't know if it stays on until reset, however.

Thanks again,
Mike
Reply With Quote
  #8  
Old 08-02-2003, 07:46 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
OK

Try this

press led 2-3 sec . if any flash comes back , wait 2 secs and then hold the button down for 8-9 sec.
[also do this if NO flash came back]
Now turn the key OFF for 50 sec , turn key ON for 10 secs, and then start engine
See if CE goes out
Reply With Quote
  #9  
Old 08-02-2003, 08:02 PM
Registered User
 
Join Date: Apr 2001
Posts: 146
I did exactly what you, and the check engine light is still on.

Any more ideas?

Thanks,
Mike
Reply With Quote
  #10  
Old 08-02-2003, 08:15 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
Check along the wire harness for insulation degeneration...
Reply With Quote
  #11  
Old 08-02-2003, 08:40 PM
Registered User
 
Join Date: Apr 2001
Posts: 146
There were a couple places in the engine compartment where the plastic around a bunch of wires had come loose. Would this be enough to make the light come on?

Also, should I be worried about driving the car?
Reply With Quote
  #12  
Old 08-02-2003, 08:42 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
do a search on Wire Harness..
Reply With Quote
  #13  
Old 08-02-2003, 09:25 PM
Registered User
 
Join Date: Apr 2001
Posts: 146
I did a search for wiring harness, and read about the problem that can affect my car. However, in digging around the wiring in the engine compartment, it's the stuff that goes around a bunch of wires that's crumbling, not the insulation for individual wires.
Reply With Quote
  #14  
Old 08-02-2003, 11:44 PM
Registered User
 
Join Date: Jul 2003
Location: CT
Posts: 140
McLoffs:
Okay, I'm not trying to be a wise ass or anything, but I'll relate a somewhat embarassing story to you. I had a light go on on my dash a few months ago (two weeks after purchasing), it looked like a cross-section of an engine with an exclamation point in the middle. This is exactly what a check engine light looks like on every GM product that I have ever owned. I hunted for codes with the push button LED diagnostic center and got nothing. Of cours it turns out that this symbol meant that I had an exterior bulb burned out (GM would never think of warning the driver of this), and only then did I realize that the check engine light on MB actually says "check engine". I only mention this because you said it came on "tonight", and the exterior bulb warning light only comes on when the headlight switch is switched on. My apologies if this post is obvious; just hoping that I'm not alone in being the most ignorant member on the board (ignorance loves company!)!! Good luck!
Brian
__________________
Brian
1995 E320 wagon
Reply With Quote
  #15  
Old 08-03-2003, 06:12 AM
Registered User
 
Join Date: Apr 2001
Posts: 146
I've had the dead bulb light come on a number of times (one of my rear side-marker lights comes loose sometimes) so I'm entirely too familiar with what it looks like. :-) Unfortunately, this is the check engine light. In true M-B fashion, it says it right on it. Hopefully I'll be able to figure out what causes it to come on.

Thanks,
Mike
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 09:50 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page