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-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-17-2004, 09:15 PM
Registered User
 
Join Date: Oct 2002
Location: South Carolina
Posts: 85
Question Need to reset O2 sensor dash light

Just replaced my O2 sensor, but I do not know how to reset the
dash light. Searched previous posts and could only find reference to disconnecting battery. Tried it - did not work.
'93 190e 2.3
Can anyone help me out?
__________________
1993 190e 2.3
Spruce Green Metallic
62k original
Reply With Quote
  #2  
Old 04-17-2004, 09:55 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,787
Could be that the dash light is indicating another problem. Is yours a model with a button and LED in a (X11) connector along the firewall? If so, set the key to #2 position (just before the starter engages), press the button for 2 seconds, then count flashes. Press the button for another 2 seconds and check for other codes. The codes will repeat in ascending sequence.

Sixto
95 S420
87 300SDL
Reply With Quote
  #3  
Old 04-17-2004, 10:32 PM
Registered User
 
Join Date: Oct 2002
Location: South Carolina
Posts: 85
Sixto-
Thanks for responding-
I believe that I found the test connection (X11/4 - impulse readout, 8-pole). Am I correct?
Held button in for 2 seconds and received 1 flash.
LED was on when I turned key to #2 position. After I held it in for 2 seconds, it did go out and then the 1 flash.
If I press the button again - the LED stays on.
-John
__________________
1993 190e 2.3
Spruce Green Metallic
62k original
Reply With Quote
  #4  
Old 04-18-2004, 02:05 AM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,787
That goes beyond what I know of the early OBD. I'm pretty sure the light should never stay on and shouldn't come on until you hold the button for two seconds. I believe one flash means the ECU is fine.

Try getting Steve B or Donnie in on the thread.

Sixto
95 S420
87 300SDL
Reply With Quote
  #5  
Old 04-18-2004, 04:16 AM
MTI's Avatar
MTI MTI is offline
Registered User
 
Join Date: Nov 2002
Location: Scottsdale, Arizona
Posts: 10,626
On the later model W201's there's a reset button located under the carpet on the passenger side. Have a look for a square box with a button on the top. Hold the button for at least 2 seconds. The light will only go out after the engine is started.
Reply With Quote
  #6  
Old 04-18-2004, 09:12 AM
jlomon's Avatar
Registered User
 
Join Date: Aug 2002
Location: Toronto, Ontario
Posts: 310
I just did the O2 sensor on my w202 yesterday, and to clear the CE light I just disconnected the battery. Will that work on your 201?

Jonathan
Reply With Quote
  #7  
Old 04-18-2004, 10:29 AM
Registered User
 
Join Date: Oct 2002
Location: South Carolina
Posts: 85
Checked under the carpet on passenger side. Can only locate the cruise control amplifier, SRS voltage converter, anti-theft alarm control and X11/13 which is the SRS test connection.
No box with a button.
I disconnected the battery again but no luck.
The red LED does go on (X11/4) every time I turn the key to the #2 position. If I press the button for 2 seconds it will go out, but will light up again when the key is turned to #2 position.
__________________
1993 190e 2.3
Spruce Green Metallic
62k original
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 12:49 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page