[messar]

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]

Check for cracked hoses, especially around clamps.

[SHEEDI]

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