w212 om651 dpf problem what can be causing it

[imran333]

hi i got uk model facelift 2014 mercedes e220 and i bought it recently and the engine management light came on bcuz of high soot level in dpf so i done a force regeneration with xentry and got the soot level from 200% down to 10% but within a week and only done 30 miles and the light is back on and soot level is over 200% again which is strange and i dont know what is causing it and i checked the egr in xentry and noticed the on/off ratio of exhaust gas recirculation was the only incorrect figure and it was showing red but the engine was cold, ive attached image and was wondering if its the egr valve and is there any way to test it and is there anyway in xentry to test fuel injectors?

ive done some other tests and ive included the files

 

[CowleyStJames]

I'm exhausted reading that, exclamation marks would help me breath [emoji23]
Seriously, I'm only joking with you.
I'm sure some Mercedes brainchild will come along with suggestions.

 

[BlackC55]

I'm no Mercedes brainchild but have you thought about maybe an issue with the DPF pressure sensor? We have done a few lately and keep one in stock (they are £53+ vat genuine) as they are pretty common. On the other hand we have recently had one that needs some sort of wiring repair/re-route for a DPF issue. Just musing thoughts from a receptionist so please don't take anything as gospel!!

Natacha

 

[imran333]

any way to test the sensor?

 

[Gazwould]

They'll be two , one pre and after .

 

[BlackC55]

any way to test the sensor?

No idea apart from plugging it into a star machine and see if it brings up a code

Natacha

 

[Trickythemerc]

I recently had the dreaded EML problem with a euro 6 sprinter. Cracked inlet manifold is common they also shear a bolt that you can't see but hard to diagnose without a smoke test, now mine passed the smoke test twice but with the manifold off all became clear, or so we thought. The van would drive for a hundreds of miles without fault and then throw the EML. Finally sorted with new DPF and differential pressure sensors.

Be very aware that continued use may write the DPF off.

 

[imran333]

the actual sensor has no code

 

[imran333]

yes i know that bcuz it will too blocked

 

[imran333]

done force regeneration and just will have to wait and see how long it lasts this time

 

[classiccarzone]

I did a running test on my S204 yesterday evening. It is running like a mouse's heart. Ash content is zero. Soot is 1g and the fill was at 34%-on its way up from zero.
When it reaches 108% fill and soot at 3% it will clean itself out. When it is doing this there is no increase in temp or revs, nor is there any smell. It will happily do it at 1200 rpm.
In approx 100 miles it will be at 108% full again with 3g of soot and the cycle will be repeated.

I noted the following readings which may, or may not be of interest to you.
1220 rpm; approx 50mph.
Temp: 80c
B60 Exhaust back pressure 1.35 bar.
Differential pressure .01 bar.
The Exhaust gas recirculation was between 45% and 80%

I always use MB oil 229.51 and I add Dipetane to the diesel at every fill.

 

[imran333]

Thanks for the info my readings are similar, I did do oil change myself just in case someone been using wrong oil as I recently bought the car, on the force regeneration it idles at 1400 rpm which is way more than normal idle which is about 800 rpm, I know the car is meant to do regeneration after 100% soot fill level and at 200% the engine management light will be on and car will be in limp home mode, I’ll just have to wait and see how long it lasts this time bcuz last time after force regeneration, the light was back on after about 30 miles and the force regeneration was successful and soot level was down to 5% but few days later and only 30 miles done it was 200% full but let’s see this time what happens, I did also learn the car won’t regenerate unless the fuel is at leat 15 litres which is just over a quarter of tank, but before this I had bmw f10 520d and I drove that just city driving for 2.5 years and I always drove it with low fuel but never had any dpf related problems even once and I only drove it city driving and I never ever noticed a regeneration taking place, which is making me think maybe bmw are using better dpf technology and parts but I’m not sure about that

 

[gianton]

I did a running test on my S204 yesterday evening. It is running like a mouse's heart. Ash content is zero. Soot is 1g and the fill was at 34%-on its way up from zero.
When it reaches 108% fill and soot at 3% it will clean itself out. When it is doing this there is no increase in temp or revs, nor is there any smell. It will happily do it at 1200 rpm.
In approx 100 miles it will be at 108% full again with 3g of soot and the cycle will be repeated.

I noted the following readings which may, or may not be of interest to you.
1220 rpm; approx 50mph.
Temp: 80c
B60 Exhaust back pressure 1.35 bar.
Differential pressure .01 bar.
The Exhaust gas recirculation was between 45% and 80%

I always use MB oil 229.51 and I add Dipetane to the diesel at every fill.

What type of fuel do you use and how much dipetane is needed at every fill?

Thanks for the info.

 

[classiccarzone]

Here in Ireland we basically have just the one fuel, thankfully; although there is one supplier copping on to the money that can be made by selling "upgraded" diesel. I use the standard fuel and will continue to do so.

If I need to clean out a diesel before a test I often put half a litre of Dipetane into 20 litres of diesel and give it a good brisk drive.
When that is used I refill again with 20 litres of Diesel and put a quarter of a litre of Dipetane in.
After that I put a measure into 50 litres although I do not measure it exactly.

You must have some problem with gas recirculation because I never go higher than 3g of soot in 100 miles.

I use icarsoft and that will report on the sensors and will also give you readings on the injectors, but you should know from you MPG return if your injectors were over fuelling.

Perhaps it is just a faulty sensor. Again my car does some sort of a quiet regen when the fill level reaches 108%-that is not a soot reading- 3g of soot and it goes down to zero.
It takes approx 100 miles of mixed driving to reach that level and it reduces to zero in approx 8 miles.

Every 600 miles it does a slightly noticeable "regen" and the mileage that this occurred at is recorded and icarsoft can bring that up.

 

[imran333]

i just use regular diesel here in uk and i dont add no dipetane bcuz mercedes manual doesnt say anything about adding dipetane or any fuel additives

 

[imran333]

What type of fuel do you use and how much dipetane is needed at every fill?

Thanks for the info.

i just use regular diesel here in uk and i dont add no dipetane bcuz mercedes manual doesnt say anything about adding dipetane or any fuel additives

 

[Gazwould]

I love these points of view , nothing can be improved upon ?

 

[UKCCE]

imran where abouts are you i can do a manaul test on the dpf pressure

 

[avantdi]

Here in Ireland we basically have just the one fuel, thankfully; although there is one supplier copping on to the money that can be made by selling "upgraded" diesel. I use the standard fuel and will continue to do so.

If I need to clean out a diesel before a test I often put half a litre of Dipetane into 20 litres of diesel and give it a good brisk drive.
When that is used I refill again with 20 litres of Diesel and put a quarter of a litre of Dipetane in.
After that I put a measure into 50 litres although I do not measure it exactly.

You must have some problem with gas recirculation because I never go higher than 3g of soot in 100 miles.

I use icarsoft and that will report on the sensors and will also give you readings on the injectors, but you should know from you MPG return if your injectors were over fuelling.

Perhaps it is just a faulty sensor. Again my car does some sort of a quiet regen when the fill level reaches 108%-that is not a soot reading- 3g of soot and it goes down to zero.
It takes approx 100 miles of mixed driving to reach that level and it reduces to zero in approx 8 miles.

Every 600 miles it does a slightly noticeable "regen" and the mileage that this occurred at is recorded and icarsoft can bring that up.

classiccarzone what model of icarsoft are you using.

 

[classiccarzone]

The latest model the MB2