C250 boost problem

[Will Ashman]

hello guys, week ago fault began with my c250 2013 bringing the engine management light on and causing the car to judder/ severe loss of power and then into limp home. Had car plugged in...
P023628 - the boost pressure sensor has a malfunction. The signal offset is outside permissible range.
P029900 - the boost pressure sensor of turbo 1 deviates from the specified value at low engine speed.
I replaced the boost pressure sensor but the fault is still there. I then had this fault code after a few days
P227962 - a leak was detected in the intake air system. The signal comparison is faulty.

I have had a good look around all visible boost pipes and any visible leaks around the turbo etc... just wondering if anyone could help me out here, is there any common problems I should be looking for? Inlet manifold? Any other boost pressure/ actuators?

Thanks, Will.

 

[mrmb]

Smoke test is the best in this case. Check your intake manifold is well.

 

[Will Ashman]

Is it a big job to gain access to the inlet manifold? What would be most likely? Snapped bolt cracked manifold? Are they plastic on this engine do you know?

 

[mrmb]

They are plastic, I was changing my one and it tool me few hours some of the hose clamps are hard to work on. You have to take out EGR cooler, valve, fuel filter, fuel filter housing and at the end you have access to the intake manifold bit I wouldn’t go to intake manifold first. Make sure that all the houses are ok.

 

[alexanderfoti]

There are issues with inlet manifolds on 651's where they break the bolts, and leak from there. There are a few other places that they can have boost leaks as well, so best to smoke test as above.

 

[David White]

hello guys, week ago fault began with my c250 2013 bringing the engine management light on and causing the car to judder/ severe loss of power and then into limp home. Had car plugged in...
P023628 - the boost pressure sensor has a malfunction. The signal offset is outside permissible range.
P029900 - the boost pressure sensor of turbo 1 deviates from the specified value at low engine speed.
I replaced the boost pressure sensor but the fault is still there. I then had this fault code after a few days
P227962 - a leak was detected in the intake air system. The signal comparison is faulty.

I have had a good look around all visible boost pipes and any visible leaks around the turbo etc... just wondering if anyone could help me out here, is there any common problems I should be looking for? Inlet manifold? Any other boost pressure/ actuators?

Thanks, Will.

I have this fault exactly on my 2013 E250

Can you advise what the problem was and hopefully how to solve?

Thanks

Dave

 

[alexanderfoti]

Boost leak! Smoke test inlet to find it

 

[David White]

Fault on mine turned out to be the Boost /Map sensor.. There's only one part listed that i could see but there's two of them on my car,

The faulty one was replaced with the Bosch one shown in the photo. It came up as low pressure sensor so I'm presuming that the other one (DC) is the high pressure sensor, which i changed first as it was easier to get to, swapping it back and replacing the second one and problem gone.

Phew!

EDIT

Its been pointed out to me that the 2 sensors are different part numbers

OE A006 153 15 28 (high pressure)

OE 007 153 00 28 (low pressure) which was my faulty one

 

[dfinney]

Fault on mine turned out to be the Boost /Map sensor.. There's only one part listed that i could see but there's two of them on my car,

The faulty one was replaced with the Bosch one shown in the photo. It came up as low pressure sensor so I'm presuming that the other one (DC) is the high pressure sensor, which i changed first as it was easier to get to, swapping it back and replacing the second one and problem gone.

Phew!

EDIT

Its been pointed out to me that the 2 sensors are different part numbers

OE A006 153 15 28 (high pressure)

OE 007 153 00 28 (low pressure) which was my faulty one





View attachment 74535

This sensor pictured is that the low pressure boost sensor as I’ve got the same problem

 

[David White]

This sensor pictured is that the low pressure boost sensor as I’ve got the same problem

Turns out theres 2 of them the other one is located under the intake area, im told cleaning them with alcohol should clear the fault, i replaced mine though and seems fine bow