Mir hat 2004 Ronald Troechelmann gesagt:
Low voltage will set EML only if it drops 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.
Mismatched tires WILL set EML light if vehicle has traction since it
reads all 4 wheel speed sensors and gets an "implausable" reading.
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 manufactorer in Germany, so I am not some "Key Board" mechanic or read some crap on the internet.
Ronald Trochelmann
Performing Imports
Performing Imports | Your BMW Performance Specialists