Boost E350 cdi 2013 year model.

[E350cdiblack]

Hi,
I have been for some time trying to solve problem on my car that goes into limp mode, but not got any exact fail code on specific sensor or problem, and also connected it to different fail code readers. We done some progress on DPF filter, found out and changed bad exhaust pressure sensor, but still its not all ok.
I have read som threads here about simulare problems but not exactly like mine.
My next to do is checking up MAP sensor better, but on this car that one seems I need a little more then 5 minutes to get out (same surprise with pipe from turbo when changing diesel filter and then cable plastic cover)

Symtoms now is going to limp mode/ no boost mode when pushed very hard or mainly reaching speed over 120 km/hour.
AND if putting ignition on and starting engine right away as normal, but if putting ignition on, switch off again, key out, wait few seconds, put on again and start engine. Car is running perfectly. This procedure is needed now even if I delete fault code and engine light on or off, it doesn't matter.

I have the Icarsoft MB 2.0 now, not perfectly happy with it but still gives alot off information. (when car connected to other more advanced computers it didn't get any clearer what it was about, only better data about pdf filter but I think that is ok now.

Maybe someone know these symptoms, a car mechanic nearby got thinking about Map sensor and I have noticed some codes earlier from Icarsoft reader that might point at it .
its more story and observation to this but this is already long

 

[onefortheroad]

155 in picture, 5 minutes to change.

A0061539928​

 

[E350cdiblack]

155 in picture, 5 minutes to change.

A0061539928​

View attachment 85768

Thanks, I check on this and happy if you are right I will just go out and check.
Do you know what sensor is under the plastic cover for cables, behind diesel filter, in front off turbo. (I searched on part number on electronic connector to it and that said connector to Map Sensor)

Do anyone know where to find exploded views for E212 Mercedes, mine is E 212.293
Would be nice to have. I think I have once seen it att some parts store internet side but cant find it now.

 

[onefortheroad]

Thanks, I check on this and happy if you are right I will just go out and check.
Do you know what sensor is under the plastic cover for cables, behind diesel filter, in front off turbo. (I searched on part number on electronic connector to it and that said connector to Map Sensor)

Do anyone know where to find exploded views for E212 Mercedes, mine is E 212.293
Would be nice to have. I think I have once seen it att some parts store internet side but cant find it now.

Take a photograph on your phone , them take a screenshot of that photo , upload the screenshot of the photo to here using the attach files tab. A screenshot is alot smaller file than the actual photo.

 

[E350cdiblack]

155 in picture, 5 minutes to change.

A0061539928​

View attachment 85768

You are right, it´s a Map sensor there on my car I just need more then 5 min get it out Few things in the way..

 

[E350cdiblack]

Take a photograph on your phone , them take a screenshot of that photo , upload the screenshot of the photo to here using the attach files tab. A screenshot is alot smaller file than the actual photo.

I will do, have it in my phone, thanks for screenshot tip, first I just want finish getting out actuell Map sensor

 

[onefortheroad]

I will do, have it in my phone, thanks for screenshot tip, first I just want finish getting out actuell Map sensor

The map would certainly give boost pressure faults if it was the issue , low or high boost .

 

[mioba]

If no fault codes them probable something pure mechanical. Turbo actuaror perhaps...

 

[E350cdiblack]

Has anyone experienced just this, (if we skip info from code reader att moment) Se below:
Putting ignition on and starting engine right away as normal it starts in limp mode ( turbo out/wastegate) But putting ignition on, then switch off again, key out, wait few seconds, put on again and start engine. Car is running perfectly. This procedure is needed at moment, no matter engine light on or off, or some fault code activ or newly cleared, that doesn't matter.

 

[E350cdiblack]

If no fault codes them probable something pure mechanical. Turbo actuaror perhaps...

When I say turbo out/wastegate in post #9 I think we are talking about Turbo actuaror as you say it, when car is working fine the arm is moving, when car goes into or starts in limp mode, it´s no activity from it. I have earlier checked the connections that is often described get broken with OMG642 motor.
But sometimes I still wonder if it is working exactly as it should when its activ.
I hope my description in #9 someone recognize, and most of all has solved

 

[Larkone]

When I say turbo out/wastegate in post #9 I think we are talking about Turbo actuaror as you say it, when car is working fine the arm is moving, when car goes into or starts in limp mode, it´s no activity from it. I have earlier checked the connections that is often described get broken with OMG642 motor.
But sometimes I still wonder if it is working exactly as it should when its activ.
I hope my description in #9 someone recognize, and most of all has solved

Yep - could still be the actuator. Have you taken it off and cleaned the internals - gear/position wheel? You can get a refurb with warranty for around £120.

Had similar issues with mine, also kangarooing under load when hot.

Cleaning and lubing them works for a while but eventually it is worth changing them. My consumption and throttle response improved no end once I changed it.

It assumes you are sure you haven't got any boost leaks - look for oily deposits around joints or along boost pipes - splits can be really hard to spot.

 

[E350cdiblack]

Take a photograph on your phone , them take a screenshot of that photo , upload the screenshot of the photo to here using the attach files tab. A screenshot is alot smaller file than the actual photo.

Back to question, what sensor is under there?
First picture is taken from right side, holding connecter to the sensor, part number on connecter is next screenshot (I understand my Car is grumpy if it has BMW parts in it ) Last is overview motor in it.

 

[E350cdiblack]

Yep - could still be the actuator. Have you taken it off and cleaned the internals - gear/position wheel? You can get a refurb with warranty for around £120.

Had similar issues with mine, also kangarooing under load when hot.

Cleaning and lubing them works for a while but eventually it is worth changing them. My consumption and throttle response improved no end once I changed it.

It assumes you are sure you haven't got any boost leaks - look for oily deposits around joints or along boost pipes - splits can be really hard to spot.

We have had boosts leaks in beginning but that should be ok, att least all basic places.
I could check more on the actuator, movements and so on.
(I was measuring the voltage under ride with the Icarsoft MB2.0 so we could see very clearly any drops. It was att that point to little battery installed in car, and noticed when letting car accelerating hard it seemed to put voltage on critical level at some points, (thoughts came if something not moving as easily as it should??)
Now is a good AMG battery in car and Voltage is stable.

But you don't recognize the need of doing ignition on 2 times to get start with actuator active?

 

[onefortheroad]

Back to question, what sensor is under there?
First picture is taken from right side, holding connecter to the sensor, part number on connecter is next screenshot (I understand my Car is grumpy if it has BMW parts in it ) Last is overview motor in it.

Possibly the swirl flap motor connection??

 

[Larkone]

But you don't recognize the need of doing ignition on 2 times to get start with actuator active?

All that is doing is re-booting the electronics and the fact you have to do it suggests there is a problem with it. Standard fix for many 'electronic weirdness' issues aka the 'big red switch' fix if you work in IT.

Possibly the swirl flap motor connection??

This can be sorted easily with a 4.7k ohm resistor by disconnecting the plug and fitting it across the two middle connections of the motor plug to fool the ECU the swirl flap motor is working

 

[E350cdiblack]

Possibly the swirl flap motor connection??

Yes that comes to my memory the wires are same.
I remember now reading simular as Larkone suggest
Can we then be sure it is no sensor there? only connection.

 

[supernoodle]

limp mode, but not got any exact fail code on specific sensor or problem

This procedure is needed now even if I delete fault code

So is are there codes or not?

How are you determining it's in limp mode if no codes?

If you say there's no boost you can at least check that as you can move the actuator with icarsoft. That tells you that the there is no problem with control circuit and that ECU has disabled boost control as either there is fault (depends on the first question) or there is some input that is giving spurious value, eg barometric pressure. (please don't go trying to change that, that was just an example).

Has the car been remapped?

 

[onefortheroad]

Yes that comes to my memory the wires are same.
I remember now reading simular as Larkone suggest
Can we then be sure it is no sensor there? only connection.

It goes to the motor , it's all I can think of down there , no sensors... have a look , .

 

[E350cdiblack]

So is are there codes or not?

How are you determining it's in limp mode if no codes?

If you say there's no boost you can at least check that as you can move the actuator with icarsoft. That tells you that the there is no problem with control circuit and that ECU has disabled boost control as either there is fault (depends on the first question) or there is some input that is giving spurious value, eg barometric pressure. (please don't go trying to change that, that was just an example).

Has the car been remapped?

It have been several different codes,, I can add them, just need to go through what I saved, and DPF filter has been questioned from time to time .
The most common is Turbocharger, an underboost condition.... and that's probably understandable when car stops boosting.

Limp mode as it appears in this: Maxium 3000 rpm, no activity from turbo actuator/flap motor, (arm inactive in lowest position toward turbo) lack of power off course without any boost, rougher shifting gear automatically up almost att reaching 3000 rpm but can change gear smoothly with paddles (manually changing gear up when above 2000 rpm.
But when not in limp mode car is just doing excellant, no Kenguring or bad shifting or any signs something not ok.

It has not been remapped as far as I know.

You say it's a way to move actuator with Icarsoft?

I have not been completely satisfied how Icarsoft MB 2.0 is with my car, some features as DPF filter cleaning that I bought it for in beginning I have not been able to reach, and in Live data I' m missing alot that I would like to see as Exhaust pressure, Dpf differential pressure and more, I have been able to see these values in Tech in ... Dpf filter We have easily seen these values at earlier stage with other type code readers.

 

[supernoodle]

Well if you had an undeboost that is rather pertinent if you're reporting issues with boost.

My icarsoft CR Max at least allows me to move the actuator at idle. I know they are a bit random though in what they support on other models.