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Old 09-21-2012, 10:51 AM   #1
1st Gear Newbie
Join Date: Sep 2012
Location: Canada
Posts: 2
3 series not running right

323i pulled the codes yesterday and got

02 bank 1 out of control limit
02 bank 2 out of control limit
cyl 1 2 misfire
02 bank 1 something cant remember
02 bank 2 same as above
small fuel leak < 5mm
mass air flow

cleaned the maf and its running better but still not as before, pulled codes again today and got everything minus the maf code plus mis on 12346

any ideas as to what this can be? sounds like a sensor problem to me, could it still be the maf causing this
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Old 09-21-2012, 10:53 AM   #2
6th Gear Member
Join Date: Dec 2003
Location: Ottawa, ON
Posts: 1,876
Well, the codes suggest it's the O2 sensors. SO maybe,I dunno, it's the O2 sensors?
2007 BMW 328Xi Touring, 6 speed
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Old 09-21-2012, 11:11 AM   #3
1st Gear Newbie
Join Date: Sep 2012
Location: Canada
Posts: 2
I forgot to add the brake booster has a vaccum leak too could that have anything to do with it? unseen air by the maf?
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Old 09-21-2012, 02:17 PM   #4
Parts hoarding partner...
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Join Date: Nov 2007
Location: Toronto
Posts: 3,406
fix by starting with the cheapest to the most costly. I'd take care of the vacuum leak then recheck codes. o2 sensors aren't uncommon.

I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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