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C55 P0442 "Small Leak Detected"

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Old Mar 27, 2015 | 09:28 AM
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From: Bella Vista, AR
05 C55 AMG
C55 P0442 "Small Leak Detected"
I have recently been getting the P0442 code, "Small leak detected". For those who have been through this process, what parts do you recommend I look in to replacing and in what order?

Thanks,
Derek
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Old Mar 27, 2015 | 01:04 PM
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Something Slow
gas cap, Fuel Neck .. you need to do a smoke test..
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Old Apr 6, 2015 | 08:52 PM
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New gas cap is in....will wait and see how it works out.
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Old Apr 6, 2015 | 08:59 PM
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Originally Posted by Quickvr4
New gas cap is in....will wait and see how it works out.
N80/EVAP valve next to ABS pump
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Old Apr 9, 2015 | 10:49 PM
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Originally Posted by greekspec2
N80/EVAP valve next to ABS pump
I can smell a gas leak when I park the car in the garage. Would the EVAP valve cause this or is it most likely the filler neck?
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Old Apr 10, 2015 | 08:35 AM
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Can someone please post a pic of the evap valve next to the esp module?
thanks
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Old Apr 10, 2015 | 09:05 AM
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https://mbworld.org/forums/c-class-w...lve-issue.html

Here's a link with a pic, this part is very common on most european cars and we replace them at Audi alot, it basically controls/ allows fuel vapors to purge into the intake manifold vacum for combustion instead of into the atmosphere, and it's suppose to tick which is the diaphram opens in miliseconds to purge from canister when the ecu monitors it
Last edited by greekspec2; Apr 10, 2015 at 09:11 AM.
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Old Apr 10, 2015 | 09:22 AM
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So this guy shouldnt tick. Mines been ticking since i bought the car. no codes are coming up.
what type of failure will this guy cause?
thanks
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Old Apr 11, 2015 | 12:55 PM
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it should tick but the diaphragm/valve go bad allowing a small leak
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Old Apr 13, 2015 | 03:18 AM
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Ahh ok Thanks guys for the info
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