M-Class (W166) Produced 2012-2015

p261f71 code mercedes ml 250

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Old Dec 3, 2019 | 11:13 PM
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Edwin Rodriguez's Avatar
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ML 250
p261f71 code mercedes ml 250

Hello Fellow Mercedes users. I have a 2015 ML250 Bluetec , 2.1L Diesel. Getting p261f71 code. Even after replacing Water pump and re-circulation pump! Looks like there may be some Vacuum issues?? I was reading a Sprinter thred and is waht i am coming up with:

https://burdimotors.com/2017/12/26/c...s-fault-codes/
Here is what i came up with:
Fault Code Meaning: The output for circulation pump has a malfunction. Actuator is blocked.
Known Problem Of: Mercedes Sprinter Vans
Likely Causes: Coolant intrusion into vacuum system via the water pump.
What’s Happening?: On model OM651 4 Cylinder Diesel Engine the coolant water pump is vacuum actuated. The internal seal in the water pump gives way and allows coolant (antifreeze) to enter the vacuum system. The vacuum system operates with the engine running. As the vehicle is driven the vacuum is so powerful it pulls coolant (antifreeeze) deeper into the vacuum system causing havoc on the entire vacuum system.
Any help here is welcomed
Email is cibaeno69@gmail.com
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