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|3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.|
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Originally Posted by drz
Barney, welcome to bimmerwerkz. The EML indicates a fault detected by the engine management system. This could be any of a wide variety of problems. Usually, the engine management system will not inhibit power delivery until the oxygen sensors have warmed up, which may be why you can drive about three miles before experiencing any trouble.
I am hesitant to give you specifics, since without reading the codes off the car it is hard to diagnose these things. However, you may need now oxygen sensors, or maybe they have come lose. Also, stuff like a bad mass airflow sensor, a camshaft position sensor, etc, etc., could trigger the light.
Describe the drop in engine power, please. My suspicion is that the engine management unit is dropping the car into "limp mode," which is kind of a safe setting designed to allow you to drive to your destination in th event of rather serious engine management problems.
I don't know where you are located, but here in the US, we can take our car to an auto parts store (e.g., Autozone) and they will check the engine fault codes for free, which gives us the reason for the EML. You may need to take it to a mechanic or even the dealership, depending on where you are located.
(I've moved your thread to the E46 section, where it will get more attention from the people who have the most technical knowledge about your car)
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