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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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Old 01-21-2005, 10:12 PM   #1 (permalink)
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My SES light came on a few days ago, again. It had been coming on and off causing a hard idle but then would go away when i would restart it for about a year now. Took it to the dealer but they said they couldnt find anything wrong. Hadn't happend for about 4 months until now. However, now it wont go away.

Basically, the car idles rough now. I went to autozone and got an OBD read which indicated 12 errors! First, it said there was a faulty oxygen sensor. Then the next 9 errors had to do with random misfirings from all sorts of cylinders. The last two errors said something about a about the fuel, I think it was the Fuel Air Metering error or something.

Could all these errors have been caused by faulty O2 sensors or what? My car is under extended warranty with 71 k and a 2000 323ci.
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Old 01-22-2005, 12:41 AM   #2 (permalink)
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Under Warranty.. I'd bring it back to the dealer.. maybe another one, and ask them to check it out again, tell them what you found out on your own. Just my opinion, I'm not a mechanic. You could invest in your own reader for i think it's under $150 from Peake Research. Just so you know and won't have to go to autozone for thier help. Just an idea.

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Old 01-22-2005, 12:53 PM   #3 (permalink)
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squirt some carb cleaner up the air filter box,,with the filter removed...


i know you have no carb,,but it will cleaner out the air flap from the air metering sensor
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Old 01-23-2005, 12:53 PM   #4 (permalink)
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I had the same thing happen to me just last week to my 2000 328i. I had fault codes reading o2 sensor adaption limit and control limit. Also all cylinders were missfiring. Car was running extremly rough at idle and missfiring. To make a long story short it was a vacum leak that was causing the problem. It was the crankcase vacum valve that went out. Only cost about 50$ to replace. This part has a rubber diaphram and it went out. The way I tested it was I sprayed carb cleaner on all of the vacum lines to check for leaks and eventuly I sprayed the front hose that connects to the crank case under the intake manifold and the car started to run normal again. Hope this helps. Jesse
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