Code P0456
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
P0456 = Evaporative Emission Control System Leak Detected
(very small leak)
You have an EECS leak. There are many threads in this regard.
Can be anything from a loose filler cap to a cracked filler pipe to a leak in the carbon canister to a purge circuit leak. Cracked filler pipes were common on 2005.
Check the basics. If you can't find it have the system smoke tested.
(very small leak)
You have an EECS leak. There are many threads in this regard.
Can be anything from a loose filler cap to a cracked filler pipe to a leak in the carbon canister to a purge circuit leak. Cracked filler pipes were common on 2005.
Check the basics. If you can't find it have the system smoke tested.
Last edited by Glyn M Ruck; May 17, 2014 at 12:29 PM.
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From: Canada, Ontario, Brampton
E63 AMG W211 & W203 Sport Pkg
Thread Starter
Senior Member
Joined: Jan 2007
Posts: 338
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From: Canada, Ontario, Brampton
E63 AMG W211 & W203 Sport Pkg
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Joined: Jan 2007
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From: Canada, Ontario, Brampton
E63 AMG W211 & W203 Sport Pkg
if its the metal filler pipe there will be no option but to replace the entire unit i guess
i will check it before ordering the new one
i will check it before ordering the new one
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Mercedes c230 komoressor 2005
2005 c230 komoressor p0456
I had the same code. It was very annoying. I Couldn't pass smog. I initially changed the gas cap and purge valve. The check engine light came back on several days after resetting all the codes to cycle I eventually went to get a smoke test done ($75) and smoke was coming from the fuel filler neck region. I replaced the fuel filler neck and that solved my problem. I really wanted to thank this forum informing us the common problems on our vehicles and I wanted to share my story. I spent over $750 on parts and labor and over 2 weeks trying to correctly diagnose this problem with the help of a Mercedes tech friend that I have. I really don't know how much this would cost thru the dealership, but it might be exoensive unless you do it yourself.
Last edited by ngfriend; Aug 14, 2015 at 01:38 PM.
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Joined: May 2011
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From: London ON Canada
2005 230 Kompressor Coupe, 1977 Suzuki PE 250, 1977 Suzuki RM250, 1987 Toyota Supra
I had the exact same problem on my 2005 coupe. The dealership changed my MAF filter and then informed me they wanted $670+ to fix the leaking evap system.
I tok my car to my indy mechanic who was able to place a "stent" to repair the broken hose. Cost me $90.00. That was about 4 years ago and it's still holding. But the key is to run the smoke test. That will tell you where the leak is. Be sure to remove the right rear fender liner because that's where the charcoal canister is.
I hope this helps, Doug
I tok my car to my indy mechanic who was able to place a "stent" to repair the broken hose. Cost me $90.00. That was about 4 years ago and it's still holding. But the key is to run the smoke test. That will tell you where the leak is. Be sure to remove the right rear fender liner because that's where the charcoal canister is.
I hope this helps, Doug
Junior Member
Joined: May 2011
Posts: 58
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From: London ON Canada
2005 230 Kompressor Coupe, 1977 Suzuki PE 250, 1977 Suzuki RM250, 1987 Toyota Supra
Oh,and I forgot to say that living in Canada, sometimes snow gets caught up in the upper fender, then you hit a pothole (none of those in Ontario, right) and break the hose. Anyway that's what happened to me and I thought I would pass that along to you. Oh and Glyn M Ruck is a genius.
Good luck Doug
Good luck Doug
