Mercedes C Class P052E71 The crankcase ventilation valve is faulty. The actuator is blocked

[Navedq]

Hi I have the following error P052E71 The crankcase ventilation valve is faulty. The actuator is blocked. I am trying to locate what the valve looks like and where its located. Any help would be greatly appreciated. My car is a C180 year 2012.

 

[AMGeed]

I can't offer any more help than the diagram showing all the engine breathing pipes.
I've no idea which one it is.

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[Navedq]

 

[Navedq]

Ventilation of the C class consists of 3 Systems

A Partial Load system
B Wide Open throttle system
C Oil Separator

Crankcase is vented by the line from the air intake pipe

When partial load line is functioning ventilation occurs from the oil separator to the charge distributor.

When the wide operation line is functioning ventilation takes place from the oil separator to the air intake pipe. The wide open throttle line has a heater to prevent freezing in cold weather conditions.

Blow by gases are removed from the oil filler neck to the oil separator. The oil separator is connected to the crankcase through a port

Diagram Explained

1. Oil separator ventilation system
2. Oil separator
3. Engine Ventilation
4. Purge Valve
5. Tank Ventilation connection
   R39/2 Wide vent line heater
   Y58/2 Partial load Crankcase ventilation Valve

 

[Navedq]

 

[Navedq]

The Error P052E71 is relating to this valve Crancase ventilation valve ( part number A0009975012 )that forms the partial load ventilation system. This part is also know as the Vacuum valve/solenoid valve. My Autel software calls it the Crankcase Ventilation valve. To confirm that this was the valve I removed the wire connector powering this valve to get another error which gave me open circuit on the Vent Valve which confirmed that this was the valve I needed to fix.

I opened the valve and blew through it and noticed some light resistance. Powering this solenoid valve closed the port inside to allow no air to get through at all. I believe in the open position it was partially blocking air from getting through hence blockage error. After working it a few times I plugged it back in and no error P052E71. I drove the vehicle for a good 5-10 miles and no error. I will be changing this part as the valve could get stuck again.

SOLVED

 

[ajlsl600]

Grand. Another issue resolved by forum and members of.
Worth it's weight in gold.

 

[Navedq]

Mercedes updated part number is 2740187301 also called bleed line and the price for this is 42.70+VAT

 

[kbjr]

i have the same issue but it only happens when driving around the 60 - 70 mph mark never at slower speeds. i have a mb 2 so have reset the engine light to discover this. would this be the same part. ive heard mercedes charge around £2000 to fix

 

[Arjunf]

Hi. Would this part be the same for C200 petrol 2017. The problem and error code is same. Acceleration over 50mph and it hesitates.

 

[Arjunf]

i have the same issue but it only happens when driving around the 60 - 70 mph mark never at slower speeds. i have a mb 2 so have reset the engine light to discover this. would this be the same part. ive heard mercedes charge around £2000 to fix

Hi. Did you get this sorted?

 

[kbjr]

no not yet haven't been using the car due to career change

 

[Arjunf]

The Error P052E71 is relating to this valve Crancase ventilation valve ( part number A0009975012 )that forms the partial load ventilation system. This part is also know as the Vacuum valve/solenoid valve. My Autel software calls it the Crankcase Ventilation valve. To confirm that this was the valve I removed the wire connector powering this valve to get another error which gave me open circuit on the Vent Valve which confirmed that this was the valve I needed to fix.

I opened the valve and blew through it and noticed some light resistance. Powering this solenoid valve closed the port inside to allow no air to get through at all. I believe in the open position it was partially blocking air from getting through hence blockage error. After working it a few times I plugged it back in and no error P052E71. I drove the vehicle for a good 5-10 miles and no error. I will be changing this part as the valve could get stuck again.

SOLVED

Hi. Thanks for the thread. I have the same issue on C200 2017 model. W205. Would this ventilation valve be in same place in my car. Having trouble locating it. Any info is appreciated

 

[Arjunf]

Hi. Just ordered this part and another ventilation pipe. Will change when i get time and update