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      04-20-2013, 01:14 AM   #27
bmobile
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Drives: e93
Join Date: Mar 2012
Location: sf

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update: I replaced the sparks plugs and both pre-cat o2 sensors last week. When I cleared the fault code, I noticed another one: 27B1 secondary air system... Any insight on this?

I cleared them both, driven about 50miles and they haven't returned. The car definitely feels smoother at low-end likely due to the new spark plugs, but still a bit sluggish between 5-8k rpm.