M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

2011 ML350 - P0155 Component Y16/2 Problem

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Old 03-11-2024, 08:40 PM
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2011 - ML 350 4Matic
2011 ML350 - P0155 Component Y16/2 Problem

2011 ML350 4Matic gasoline, My VIN: 4JGBB8GB8BA659767 about 160k milage

The car is running fine as far as I can tell. However, there is a current code 0407 - Component Y16/2 (Heating system shutoff valve) has an open circuit in the wiring. (P0155)


Any idea where I should start to fix this code?

Old 07-04-2024, 08:41 AM
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2006 Mercedes C230 Sport U.S. model
2006 Mercedes C230 2.5L, Y16/2 Code P0115 0407

I have the same issue except mine is P0115, Y16/2 Code P0115 0407, were you ever able to resolve the issue? I have same going on in my 2006 C230.
Thanks
Old 07-04-2024, 01:50 PM
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1998 SL500,2011 GL550,2009 ML350,past 1995 E320 Cabrio ,2005 ML500,2006 ML500,1996 SL500,1972 280SEL
P0155 code

Many P0115 errors are the thermostat is sticking. They are probably the number 1 part replaced on many MB engines. Relatively an easy job.. don’t reuse the Oring in the housing.. would probably buy the upper hose and thermostat will be complete with housing. Change your antifreeze at the same time would be another addition I would make.

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