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

LinkBack Thread Tools Display Modes
Old 09-12-2009, 11:20 PM
Registered User
Join Date: Jan 2009
Location: Napa Ca
Posts: 75
OVP fuse and check engine light

I have not read so much since I was in college...about OVP. my engine light comes on for some reason....code says #4...but if I go and remove the fuse in the OVP and put back in...start the engine, the light goes out...for a while anyway. I need to smog this car but afraid it will fail even tho it runs great

Any help as to why?

Reply With Quote
Old 09-12-2009, 11:37 PM
1990 190E 2.6 Automatic
Join Date: Jul 2009
Posts: 64
Code #4 is likely something wrong with your Air Flow Sensor, You may have a issue with the sensor, Sensor wiring, grounds or some other issue, How ever before you go down the long Diagnosis road, If your OVP relay has many miles/years on it, I would just replace it with a brand new, latest and greatest version of it [not a used/junk yard unit]. Clear your codes, road test and see what happens. Your OVP relay powers up your CIS and ABS control units and they are a well known Pattern Failure component. They can fail completly or just drop a circuit now and then. The vehicle will run without a functional OVP relay, but likely not well. I just fixed a CIS/ABS light issue in my 1990 190e 2.6 by replacing the OVP relay.
Reply With Quote
Old 09-16-2009, 06:57 PM
Registered User
Join Date: Feb 2008
Posts: 64

What is the OVP and where is it located???????

Reply With Quote


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 05:52 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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