Subject: how the EML works+comments from Ronald Troechelmann Author: shogun (moderator) : member since March, 2004 : 12553 posts Posted on: 2008-04-30 00:27:29

this shows you the items which could be the cause.
in 2004 I got a reply from a 20 year BMW master with PhD

quote:

Mismatched tires WILL set EML light if vehicle has traction since it reads all 4 wheel speed sensors and gets an "implausable" reading.
Low voltage will set EML only if it drop below 11v for more than 90sec. Low voltage will also cause problems with the IKHA (heater/ac), memory for seats/steering and transmission will go into limp mode.
Since this only happens in traffic I would look at transmission control/traction control/ABS/wheel speed sensor. Of course it could be something completely unrelated, but this is a start.
Just for clarification: I am a 20 year BMW Master with 3 PhD's from Germany in Engineering and I know these systems better than almost anyone. I did 12 years of R&D on these system for a manufactoror in Germany, so I am not some "Key Board" mechanic or read some crap on the internet.
Ronald Trochelmann
Performing Imports
www.performingimports.com

unquote

Just an idea. You have to check all aspects which can trigger the EML light.

E32 750iL 11/88, E32 750iL Highline 03/90
7 series Tech tips
http://tinyurl.com/3486c

• Check Engine light at high speed deceleration - carlivar 2008-04-30 00:02:42 (116 views)
  • how the EML works+comments from Ronald Troechelmann (url) - shogun 2008-04-30 00:27:29 (266 views)
    • Check Engine, not EML - carlivar 2008-04-30 00:48:55 (115 views)