How do l fix my bmw e46 325ci eml light comes on whiles driving

The car is trying to tell you something - limp mode is there to protect the engine if a serious problem is detected. Stop driving it and get someone out to scan the codes and diagnose this.

Take it in for diagnosis then you have the cause of the EML coming on.

are there any after market things added to the car. like a radio or alarm

The "EML" warning light in a BMW indicates a problem with the "drive by wire" throttle control system."

"EML" is an acronym for "Elektronische Motorleistungsregelung". Loosely translated from the original German for the BMW owner means Electrionic Engine Power Control.

"EML" is BMW's system name for electronic throttle management. The "EML" system, in it's most basic sense consists of an accelerator pedal (with an electronic position sensor), a computer module (usu. integrated with the main engine computer), and an EDK (Elektronische Drosselklappe or Electronic throttle valve). The EDK is also known as a "drive by wire" throttle. "EDK" throttles use a computer controlled stepper motor rather than a purely mechanical linkage (usu. metal cable attached directly to the accelerator pedal) to control the opening and closing of the throttle plate.

"Drive by wire" throttles are very common on modern vehicles starting in the late nineties up through the present day. "Drive by wire" technology enables very precise throttle control to improve drivability and vehicle emissions, as well as many convenience features like electronic cruise control, traction control & stability control.

BMW first implemented "drive by wire" in very limited quantities on the most expensive & sophistocated BMW models starting in 1988.

The latest generation of advanced vehicle features to take advandage of "drive by wire" technology are radar guided cruise control, accident avoidance control, autonomous-driving, and autonomous-parking systems.


Read more: http://wiki.answers.com/Q/What_does_eml_warning_light_on_a_bmw_mean#ixzz1OnBNssKH

get car onto diagnostic machine to find the fault, then you can decide if you want to fix it or get the garage to do it for you....
ive been in the trade for years and with modern cars guesing whats wrong is too costly..computers are good for somethings.....

It's not an old scool cars anymore.
No advise is possible untill you take it to workshop and let them scan it , I'm sure ECU stored all information and fault codes.

Check the ABS brake sensors in your wheels, if they are not functioning properly. It will trigger the computer to engage the ASC auto stability control light as the asc uses the brakes to assist in control. I will also engage the EML engine management light to slow the rev point to limp mode

The EML light will come on if you have an emissions fault , the car may drive ok but you may find you are using more fuel , it would be better to get the problem checked just to be on the safe side , regards mark.

What is limp mode, and it is MiL light( mal function indicator light)it is not EML. Please specify so i can help

As for the limp mode unless you have an expensive diagnostic system this usually has to be done by BMW (anything to get ya to a dealership!!). The comms problem, is the key turned in the ignition?