97w140 coupe - Mercedes-Benz Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 10-23-2019, 08:34 AM Thread Starter
Junior Member
Join Date: Oct 2019
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
97w140 coupe

I keep getting a p0446 and after warm up also get p0300 and p0308. I have replaced the fume pump but still get these dtc’s. Where do I go from here?
[email protected] is offline  
Sponsored Links
post #2 of 2 Old 10-23-2019, 01:08 PM
Join Date: Dec 2016
Vehicle: 1999 ML430, 2000 ML320, 2005 E500 4matic wagon
Location: Wisconsin
Posts: 142
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
The misfire codes and evap code are probably not related.

For the evap code it may need to be smoke tested or have the purge system inspected/tested.

For the misfire codes more often than not it is an ignition issue like the spark plugs or leads. What is the service history on those?
In rare cases an injector can fail causing the misfire.

What engine is in your W140?
Noodles is offline  
Sponsored Links

  Mercedes-Benz Forum > Mercedes-Benz Enthusiasts Forums > Mercedes-Benz Classic Cars

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome