E46Fanatics - View Single Post - 330xi rough idle/misfire codes
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Old 09-28-2012, 09:00 PM   #28
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Join Date: Oct 2010
Location: Minnesnowta
Posts: 3,673
My Ride: 4cyl of fury
The O2 sensor codes should tell you which sensor is failing or has failed (sensor 1 or 2). I'm not sure that the DISA would have an effect on idle speed or not but it's easy enough to check its operation.

Have you checked/cleaned your idle valve?
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