Can't pass CA smog. Code 456
10-05-2022, 04:04 PM
#1
Junior Member
Thread Starter
Can't pass CA smog. Code 456
2011 E350.
When I fill my tank full I can smell gas fumes outside the car pretty strong. It goes away when tank is 75% full.
My 2003 E350 had same problem which was related to a recall you could have fixed for free but I never did it. I am pretty sure this leak is causing the code 456 now so I
am wondering if others have had this issue and is there a recall for this year same fuel tank problem?
When I fill my tank full I can smell gas fumes outside the car pretty strong. It goes away when tank is 75% full.
My 2003 E350 had same problem which was related to a recall you could have fixed for free but I never did it. I am pretty sure this leak is causing the code 456 now so I
am wondering if others have had this issue and is there a recall for this year same fuel tank problem?
10-05-2022, 08:53 PM
#2
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MY'14 W212 M276 3.5NA @55kMi
2011 E350.
When I fill my tank full I can smell gas fumes outside the car pretty strong. It goes away when tank is 75% full.
My 2003 E350 had same problem which was related to a recall you could have fixed for free but I never did it. I am pretty sure this leak is causing the code 456 now so I
am wondering if others have had this issue and is there a recall for this year same fuel tank problem?
When I fill my tank full I can smell gas fumes outside the car pretty strong. It goes away when tank is 75% full.
My 2003 E350 had same problem which was related to a recall you could have fixed for free but I never did it. I am pretty sure this leak is causing the code 456 now so I
am wondering if others have had this issue and is there a recall for this year same fuel tank problem?
You can check for recalls on MBUSA web portal with your VIN#, right? Konigstiger has the pulse on that channel.
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pierrejoliat (10-07-2022)
10-05-2022, 10:28 PM
#3
MBWorld Fanatic!
P0456 is an evap system leak, basically, the gas tank isn't holding a mild vacuum when the car is off.
you pretty much have to go through the whole evap system checking for cracked or loose hoses, cracked fittings, and/or a bad evap charcoal canister. or it could be as simple as a leaky gas cap.
you pretty much have to go through the whole evap system checking for cracked or loose hoses, cracked fittings, and/or a bad evap charcoal canister. or it could be as simple as a leaky gas cap.
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pierrejoliat (10-07-2022)
10-06-2022, 09:46 AM
#4
Junior Member
Thread Starter
Thanks. I heard about the gas cap thing before so maybe I will try that first. Otherwise the shop says they can pump in smoke thru the system and see where it might be leaking. They also mentioned the pump and O ring thing too. Not sure how much it will be to fix. Let you know.
