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Discussion Starter · #1 ·
I have had 2002 e46 for just a month, yesterday the emmision light came on and the car stopped. it fired up again the light was still on and the car went into get me home mode. I had someone look at the codes today which said flat battery, which i do not appear to have ! He reset them and the is now running ok. has anyone any idea what happened.
 

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I used to have a 2001 318i and I had a similar problem. My emissions light came on and the car went to get me home mode. When I had the code read it brought up a fault with the sensor on the front of the engine (sorry I can't remember what the sensor was called) I also found a breather pipe at the back of the engine that gets hot and over time a hole had melted in the pipe. I replaced the sensor and the pipe and that solved the problem.

Also the emissions light came on another time, on the morning I was selling the car. Luckily for me them man who was buying the car was a self employed BMW mechanic and he had brought his code reader with him. This time it was a problem with the oxygen sensor on the exhaust. The car had been stood for a week in damp weather and when I started the car the emissions light came on. This might be worth looking at as well.
 

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Where did you get the codes read at? BMW main dealer or specialist? or was it just a EOBD code reader?

And when the car stopped was it while you were driving or coming up to a junction e.t.c?

Any other lights appear on the dash?
 

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Discussion Starter · #4 ·
It was at junction, the engine EML light also came on but went off when i restarted the car. The garage i bought the car from read the codes not sure what they used the size of a lap top plugged in just under the steering wheel, The car is a little bit jerky at the moment
 

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If your car is jerky whilst driving it could be because of a misfire. Your car has 4 coil packs (1 for each cyclinder) and any one of these could be faulty, but may not trip any sensors therefore no warning light(s) on the dash. The tiniest fracture/fault in the coil packs will affect the firing of the engine and in a BMW this will have a noticeable effect due to the closed loop system.
 

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This is what is happening with me at the moment. I took my car to a garage after the emissions light came on and they read the code and said it was an "unknown fault"?

They then told me that they had cleared it, it hadnt come back on and that it was nothing to worry about.

I have noticed the car idling rough and a little spluttery sometimes; and it is also using a huge amount of petrol; 50 quid getting me 300 miles tops.

What does this sound like? No garage seem to know what the problem is here and I dont have enough money to take it to BMW.

Pls help?

Thanks

Oliver
 

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This is what is happening with me at the moment. I took my car to a garage after the emissions light came on and they read the code and said it was an "unknown fault"?

They then told me that they had cleared it, it hadnt come back on and that it was nothing to worry about.

I have noticed the car idling rough and a little spluttery sometimes; and it is also using a huge amount of petrol; 50 quid getting me 300 miles tops.

What does this sound like? No garage seem to know what the problem is here and I dont have enough money to take it to BMW.

Pls help?

Thanks

Oliver
The garage that read your codes originally, was it a BMW dealer?

BMW specialists? If yes did they use a BMW specific scanner to read codes?

Did they check the engine over for split breather hoses e.t.c?
 
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