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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-19-2011, 10:48 PM   #1
Lobo
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Join Date: May 2006
Location: California
Posts: 103
My Ride: 330Cic
Check Gas Cap

I know this has been covered in other threads. I'm trying to see if I can figure this out first before I buy a gas cap, start cleaning connectors, and so forth.

I am seeing the Check Gas Cap light and occasional SES light, which I reset with the Peake tool. It comes back. Not right away, but it seems that cleaning the gas cap doesn't solve the problem.

The Peake code is 27CC from table 20: DMTL - leakage

I haven't seen this until after I had work done that included removal and reinstall of the intake manifold and replacing the oil separator.

So I am wondering if I can deduce that something from the repair is causing the code.

Everything else is running fine, so I'm only annoyed that I don't understand the existing threads well enough to go right to the problem. (I've been able to do that enough times, thanks to this forum, that I have come to expect this for a lot of repairs!)

The car is a 2004 330Cic.
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*** Our Rides
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1999 Bright Red 323i
2004 Jet Black Chevy Suburban

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Old 02-04-2012, 01:13 PM   #2
Lobo
Registered User
 
Join Date: May 2006
Location: California
Posts: 103
My Ride: 330Cic
Smog Test Fail -- DMTL Leakage Problem?

I need to bump this. It has been over a year, so maybe someone seeing this post is familiar with the DMTL leakage problem and knows what I can do to diagnose and fix? I have replaced the gas cap, which is the first thing someone recommended, but I'm not sure where to go form there.

I reset the SES light with my Peake tool, and then went right over to the smog test. I should have known I needed to drive it for 40-50 miles before going over there, but I didn't even think about it.
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*** Our Rides
2004 Jet Black 330CiC
1999 Bright Red 323i
2004 Jet Black Chevy Suburban

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