Two Different Codes On My 94 E320
 

MY CHECK ENGINE LIGHT CAME ON THE OTHER DAY AND I PRESSED THE BUTTON BY THE LITTLE LED UNDER THE HOOD AND THE LED BLINKED 5 TIMES WHICH IM TOLD IS EGR.. OK .. WHEN I PRESSED IT AGAIN THE LIGHT BLINKED FOUR TIMES..(AIR INJECTION??)).. THE NEXT TIME IT BLINKED 5, THEN 4 AGAIN.. IS THIS THE NORMAL WAY FOR THE SYSTEM TO DISPLAY MULTIPLE CODES OR DO I HAVE A PROBLEM?? ALSO,, IF THE CODE 4 IM SEEING IS REAL.. WHAT MIGHT NEED TO BE DONE TO FIX IT?? ANY HELP WOULD BE GREATLY APRECIATED/// THANKS

The EGR code is more than likely indicating that you have a plugged line from the EGR valve to the intake manifold. Do a search and there are instructions for testing and resolving it. It is a diyer job.
Not too sure about the 4 blink code.
Yes, that is the way it works.

CAPS LOCK Please....

Code #4 is Air Injection and I suspect that you have a bad vac. hose connection between the intake and the switch-over valves.
Take the front, top cover off [ in front of valve cover] and trace the hose where it passes the front of the engine.. Both the egr and air pump SOVs are fed vac from a common line. If this leaks/cracked, etc, both codes will display.

In the UK- and I guess much of Europe we don't get these diagnostic codes. They seem seriously useful.

Can the diagnostic plug be retro-fitted to Euro-Spec cars? Anyone Know?
Or is it a new ECU and who knows what else?
Thanks


Barry
W124 E200 Wagon 108,000 miles

thanks
 

thank you for your excellent advice// i removed the cover on the front of my engine and found one small plastic vacume line disconnected.. pluged it back in and reset the codes.. hope they stay gone! benjay

Bazzman,
Are you near Frimley??

David

Not far, about 20 miles.

Re: thanks
 

Good.
Thanks for posting your findings and also for hitting the caps lock.....
Arthur