Technical Powerloss Ducato MJ130 2012, Historic problems with DPF regen

[niceup]

Hi together,

I own a Ducato MJ130 2.3L 131 PS from 2012 with DPF. I bought it 1 year ago and had following problems from the day I bought it:

- white blueish smoke during DPF regen (no coolant, unburnt diesel)

At the shop they changed the EGR and changed 2 glow plugs (other 2 could not be removed). This unfortunately did not help, but worsen the situation.

After driving a bit (always longer trips, > 100 km) again white smoke appeared during DPF regen. After another trip without white smoke (= no DPF regen) the engine check lamp & limp mode activated.
I checked DPF differential pressure (very high > 150 mbar) and boost pressure (non existant). After a manual DPF regen (NO white smoke?!) the differential pressure went back to normal values (idle around 5 mbar), but after driving a bit turbo was still not working and Engine check light went on again with error P0236-7A and DPF differential pressure increased a lot during a 40 km trip.

Error codes currently:
P0236-7A Air supply circuit anomaly
P0683-13 Preheating glow plugs signal

One thing I wonder about: Atmospheric pressure is always around 950 mbar, which is in my opinion too low?

First quick check of pressure the low pressure tube going to turbo looks fine.

Going uphill I can only drive around 45 mph, on flat streets around 80 mph

Do you have any ideas why and what has to be done?

Thanks in advance!

 

[bugsymike]

Hi together,

I own a Ducato MJ130 2.3L 131 PS from 2012 with DPF. I bought it 1 year ago and had following problems from the day I bought it:

- white blueish smoke during DPF regen (no coolant, unburnt diesel)

At the shop they changed the EGR and changed 2 glow plugs (other 2 could not be removed). This unfortunately did not help, but worsen the situation.

After driving a bit (always longer trips, > 100 km) again white smoke appeared during DPF regen. After another trip without white smoke (= no DPF regen) the engine check lamp & limp mode activated.
I checked DPF differential pressure (very high > 150 mbar) and boost pressure (non existant). After a manual DPF regen (NO white smoke?!) the differential pressure went back to normal values (idle around 5 mbar), but after driving a bit turbo was still not working and Engine check light went on again with error P0236-7A and DPF differential pressure increased a lot during a 40 km trip.

Error codes currently:
P0236-7A Air supply circuit anomaly
P0683-13 Preheating glow plugs signal

One thing I wonder about: Atmospheric pressure is always around 950 mbar, which is in my opinion too low?

First quick check of pressure the low pressure tube going to turbo looks fine.

Going uphill I can only drive around 45 mph, on flat streets around 80 mph

Do you have any ideas why and what has to be done?

Thanks in advance!

As I understand it, the full heater plug operation is required to assist in the REGEN operation, it may not be the total answer but certainly not helping.
I would first warm engine up fully, put a whole bottle of DPF cleaner additive in nearly full tank of fuel then go straight away for a run of at least 30 miles on a dual carriageway so no stops and try and keep engine revs between 2000rpm and 3000rpm so it is working hard.
This will give the engine the best chance of fixing it's self.
If unsuccessful you will probably end up needin a new DPF filter going by your DPF pressure readings.
Incidentally I understand there was a history of some of these having faulty DPF pressure sensors, to the point where it was the first "go to" for Fiat mechanics.
May be worth testing if your diagnostics can do that.
I use this stuff and once working put in half a bottle with every tankfull of fuel.
Many modern diesels are only used for short slow speed trips which is the worst thing to get a ECU to activate a DPF Regen.