Thread: Engine Problem.
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Old 08-17-2012, 07:55 AM   #7
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Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 16,588
My Ride: 330CiC, M5, X5
CCV lower oil return hose that connects to the dipstick tube base is also a big problem and is very often overlooked as it is hard to locate.

Grab the hose at the base of the dipstick and follow it back to the bottom of the CCV, if soft, covered with oil or torn/collapsed, it needs to be changed. A very common problem with lean codes along with any other crankcase air leak.
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