E93 335i P0174 code

messar · 11-04-2013, 11:49 AM

2008 E93 w/N54 engine that is new to me (67k miles).

I got curious, and hooked up my scanner, and it showed a pending P0174 code (Lean, bank 2). I cleared the codes, and cleared adaptive values, and so far, it has not come back.

However, looking at the long term fuel trim, bank 2 is twice that of bank 1.

Any thoughts?

-I don't think it's the MAF, since it's not showing on both banks.
-Are there any vacuum circuits that are separate between the cylinder banks?
-I tried to see what the O2 sensors are doing, but I can't seem to be able to monitor the live data for the pre-cat sensors, only post-cat. Not sure what I'm doing wrong there - I tried 2 different scanners, and also INPA, but wasn't able to decipher that....

Thanks,

Matt

Bronze · 11-04-2013, 10:55 PM

Check for cracked hoses, especially around clamps.

SHEEDI · 11-05-2013, 08:20 AM

here http://www.e90post.com/forums/showthread.php?t=63639

11-04-2013, 11:49 AM	#1
messar New Member 0 Rep 20 Posts Drives: 2008 E93 Join Date: Oct 2013 Location: Oregon iTrader: (0)	E93 335i P0174 code 2008 E93 w/N54 engine that is new to me (67k miles). I got curious, and hooked up my scanner, and it showed a pending P0174 code (Lean, bank 2). I cleared the codes, and cleared adaptive values, and so far, it has not come back. However, looking at the long term fuel trim, bank 2 is twice that of bank 1. Any thoughts? -I don't think it's the MAF, since it's not showing on both banks. -Are there any vacuum circuits that are separate between the cylinder banks? -I tried to see what the O2 sensors are doing, but I can't seem to be able to monitor the live data for the pre-cat sensors, only post-cat. Not sure what I'm doing wrong there - I tried 2 different scanners, and also INPA, but wasn't able to decipher that.... Thanks, Matt
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11-04-2013, 10:55 PM	#2
Bronze First Lieutenant 13 Rep 394 Posts Drives: 2008 335i sedan Join Date: Mar 2012 Location: Berkley, MI iTrader: (1) Garage List 2008 BMW 335i [0.00]	Check for cracked hoses, especially around clamps. __________________ Bronze 2008 335i sedan \| black/black \| Sport \| Premium
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11-05-2013, 08:20 AM	#3
SHEEDI Banned 607 Rep 2,703 Posts Drives: 2009 335i - Sport PKG Join Date: Jun 2009 Location: NY iTrader: (0) Garage List 2009 BMW 335i [8.50]	here http://www.e90post.com/forums/showthread.php?t=63639
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