M-Class (W166) Produced 2012-2015

P227900 and P045500 leaky leaks

Old Mar 10, 2022 | 09:54 PM
  #1  
Codeblack's Avatar
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2013 W166 ML350 4Matic V6 Gas
P227900 and P045500 leaky leaks

Anyone had any experience resolving these leaky codes? Check engine light coming on and off randomly but the code will returns after clearing.

P227900
A leakage is identified in the
inlet air system

P045500
A great leakage in the
Evaporative Emission (EVAP)
control system was identified.

Troubleshooting completed so far:

Edit:

Already checked and replaced gas cap as an initial step. Issue persisted.

Visually inspected “all” hoses from inlet manifolds to throttle body and to purge canister valve. Everything looks connected. A few hoses were not fully inserted but nothing was disconnected that I know.

With the car on idle, after some inspecting I did notice that my purge canister valve was making a loud hissing noise. I believe it was actually a vacuum noise coming out of the top of the canister.

Does anyone know if the purge canister valve is suppose to be making a loud noise on idle? Is it stuck open?

Last edited by Codeblack; Mar 10, 2022 at 10:55 PM.
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Old Mar 10, 2022 | 10:36 PM
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From: In the Shadow of the Tetons
2013 ML350 Bluetec
Eliminate the obvious first: Is the gas cap on tight?
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Old Mar 10, 2022 | 10:56 PM
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Codeblack's Avatar
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2013 W166 ML350 4Matic V6 Gas
Originally Posted by rapidoxidation
Eliminate the obvious first: Is the gas cap on tight?
thanks for the reply and yes! First step I took. I just forgot to include it above.
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Old Mar 12, 2022 | 06:58 PM
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2013 W166 ML350 4Matic V6 Gas
All cleared then small leak in inlet returned

So the purge canister valve will run in order to create a vacuum and maintain a vacuum in the system I believe. Maybe extra air is getting in somehow from the air inlet system.

Well boys the leak codes have all cleared but returned after a few days.

It appears that removing and reinstalling air intake, locating tightening anything related to the air íntake resolved the issue temporarily.

There maybe a small hole in one of the PVCs or hoses. Anyone have any easy trick to locate it?

Last edited by Codeblack; Mar 16, 2022 at 12:53 AM.
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