Soot on rear doors Expert 2.0 HDi (DW10CD)

[jsoap]

Just for info, on this model, the amount of additive filled at the factory is 3.4L

They changed the system after RPO 12137 from Eolys 176 (tank 1500CL) to Eolys Powerflex (tank 1440080380)

[GiveMeABreak]

Yes, aware of that , I've written plenty of articles on it here in the Forum, but I just wanted to let you know what the volume of additive was filled to at factory for these engines.

That RPO you quoted is not quite right as far as PSA goes. The correct data is here:

Click Fit Colour	RPO	Date	EOLYS
White	To 9492	To 04/11/2002	EOLYS DPX42
GREEN	9493 to 12109	05/11/2002 to 03/01/2010	EOLYS 176
GREEN	12110 to 12165	04/01/2010 to 28/02/2010	Infineum F7995
BLUE	12166 on	01/03/2010 on	EOLYS Powerflex

[jsoap]

The RPO changeover came from the servicebox parts data, but I've seen the other number also. Anyway my RPO is 14106 and the connectors are blue. According to diagbox this tank has a 1.6l capacity

[GiveMeABreak]

I think you'll find that it is at least 3lt. The filling kits are supplied in 1lt or 3lt. 1lt for topping up operations and 3lt kits for when the tank is replaced. I'm looking at an Expert 2.0 HDi 130 around the 2016 year.

I think in my earlier post I mentioned 3.4 lt being filled at the factory - I was looking at the DW10CTED4 engine that was also fitted to these, so sorry for the confusion. On some engines they don't actually fill the tank to capacity now - they may only fill it half or just over half - so that is probably why Diagbox is reading the 1.6l capacity - as that was the original volume filled. Don't forget the tank quantities are not physically measured - only worked out from initial volume filled against mileage and amount of additive dosed.

[GiveMeABreak]

As an example, using the C5 X7 - you can see how the different diesel engines are filled with different volumes at factory, but this is not necessarily the capacity of the tank.

Engine Type	Engine Capacity	Level of Additive Filled at Factory
DT20C	3.0L	2.4L
DT17TED4	2.7 L	3.5L
DW12BTED4	2.2 L	2.7L
DW10BTED4	2.0 L	3.1L
DW10CTED4	2.0L	1.57L
DV6TED4	1.6L	2.45L
DV6C	1.6L	1.34L

[jsoap]

I carried out actuator check on the additive pump, and I can hear it clicking and vibrating as expected.
At one point I had taken the van to the local Delphi service center to get his opinion on the state of the injectors, but he was more interested in flushing out my (broken) DPF. He had a n idea that the additive tank might be empty, and promptly whipped off one of the connectors - only to have Eolys dipping out onto the floor. This has got me thinking that the system should have been reprimed - and that it's possible that no addititive has been getting into the fuel tank.
Do you think that a total lack of additive could cause a new DPF to block in 500 miles?

[GiveMeABreak]

Hi, ok so first, if the engine ECU suspects the additive level is low and despite warnings - it will probably switch off the additive pump if it thinks it is empty. The additive level is not physically measured in the tank. If that was the case, then no assisted regeneration would be taking place - it would be relying on the exhaust gasses being hot enough to burn off the particulates, so would need to reach at least 550 °C to do that.

Assisted regenerations can occur at an average of 200 miles or even much less than this - depending on your journey type - shorter, start-stop journeys will shorten the interval between assisted regenerations of course as the vehicle is not going to get a good run or hot enough for natural regeneration to take place.

So to answer you question, yes 500 miles could have normally incurred 2-3 assisted regenerations - (again depending on driving conditions), so without these taking place, clogging is going to start becoming a problem quite soon. If you have a decent diagnostic, the engine management system should be able to tell you the level of clogging in the filter.

A DPF will start accumulating soot whenever the engine is running - so if there are no regens taking place it won't take too long for it to start clogging. You need to be careful here, because a DPF (new or not) can run into problems when it gets to 70% or more full. At anywhere over this amount, it may be impossible for a regeneration to take place as it is too clogged and will need to be removed for cleaning. So I would not recommend running the vehicle until you have worked out what is going on.

Lastly, yes, if the additive has been filled but the additive counter has not been reset, then the engine ECU will not know this and and can stop the additive pump from operating to prevent damage.

[jsoap]

Thanks.

To recap, the filter was replaced 500 miles ago, assisted regens have been happening every 50 miles - even on the initial motorway run of 250 miles.
Risk of filter blocking message came up 65 miles after the 9th regen, followed by filter blocked 25 miles later. Since errors P1447 and P1490 are both present, a forced regen is not possible and Lexia indicates that a replacement filter is needed.
After the "blocked" message came up, the differential pressure across the filter was reading 65mb at idle. The "Degree of clogging of the PEF with soot" is 0% - but it always seems to read that. I also notice that "Short term regeneration capacity" is always 0%
If the flow of Eolys had been interrupted, then no passive regeneration will happen and assisted regens will not be as effective - whether that would fit the symptoms at this point I don't know

[jsoap]

After leaving the van with the local dealer, they finally had the injectors tested, and all 4 were worn and overfueling 10-20%.
New injectors fitted and first regen was triggered at 5g/l after ~350 miles.
Just a shame that there was nothing in the ECU diagnostics to pick up on this fault condition.