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Old 10-01-2013, 03:23 PM
kbrisson kbrisson is offline
Join Date: Oct 2008
Location: RI
Posts: 6
kbrisson is on a distinguished road
Trouble Codes: P0305, P0174, P0171

A few weeks back, my '06 X3 3.0i service engine light came on. Codes read were P0305, P0174 and P0171. I've read a lot in the forums about possible causes. A few days ago, I reset the codes and they haven't come back, so I am reluctant to spend time taking things apart to look for vacuum leak or other issues I've seen in the forums. Is there some possibility that this was a one-time fluke, perhaps a bad tank of gasoline or something like that? I also thought I read that it could be dirty MAF as a result of oil from a K&N air filter, which I have had one for about a year now.
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