BMW (e39 1999) eml and asc lights and in limp mode

possible causes are
crankshaft position sensor
cam shaft position sensor/s
ignition control module
broken timing belt/chain

I'm sorry Roger but you are going to have to get it to someone with access to the plug in diagnostic unit for Beemers.
there seem to be several things going on but when it coughs up the diagnostic info you may go straight to it?

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.

Run fault codes to determine what has happened to put the engine in limp home mode. Check for oil level/ water level in radiator check drive belt for alternator

Eml is the throttle fault light for the electronic throttle control you will need to get the fault codes read to find out which end the problem or problems are at on the throttle control
Asc is the traction control and when wheel spin is detected it shuts the butterfly on the one throttle body until the wheel spin is reduced get the actuator in the wheel well checked for damage to the wiring to the throttle body

Your car has entered a special 'Limp mode' which is designed to help a stranded driver limp home after a problem. In this case an issue related to electronic throttle/electronic power control between the cars computer and how it regulates engine variables based on your driving.


You ddefinitey have a problem that at the very least must be identified first and then possibly corrected by replacing a faulty part or resetting a faulty CPU.

You should stop driving the car iimmediately if possible.
The first thing you need to do is have someone 'pull the codes' almost any mechanic anywhere can do this for you and generally it is only a few dollars at most. They do this by plugging in a small computer under the steering wheel to check the 'obd' onboard diagnostics. whenever the car has a problem it sets off a code that can be pull up later to determine what exactly is wrong. Once they pull the code they will be able ot tell you what the issue is. It could be somethign as minor as a loose throttle wire or some type of larger major part failure, getting the code is the only way to find out for sure.

Good luck.

The scope of EML design on BMW engines provides:
• Throttle valve positioning for optimum starting
• Precise idle speed regulation without the use of an external idle control valve/circuit
• Progressive throttle opening curves matched to the driving program (with EGS/AGS inter-
face)
• Cruise control operation without additional control modules and linkages
• Automatic synchronization of the throttles (airflow balancing) for two independent banks,
throughout the entire engine speed range (M70, S70, M73 engines only)
• Intake air volume control for ASC/DSC (Automatic Slip Control/Directional Stability Con-
trol) systems
• Maximum road speed limiting
• Emergency "Failsafe" operation in the event of component failure

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_cd01d4e4178e5a11

EML,ASC light is on and i cant rev up 3000+ on a 2000 323i e46

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?