S80: Engine New DPF question

[37 RUBY]

Originally Posted by zaakk

That's an awesome list of things for me to look at, thanks. Work has been busy so havent had a chance to revisit, aside from the DPF is a copy. I have re-registered the DPF and limp mode seems to have gone for now. Will be having a look again tomorrow.

Thanks again.

Hello

That's just the beginning of the list

Also:
1.check for correct voltage & ground continuity at the DPF pressure sensor (I wrongly called it a switch before)
2. check the DPF pressure sensor pipes are clear - if you have access to a hand vacuum gauge you shouldn't be able to create any vacuum, if you can it's blocked, clear them out.
3.check live data for DPF pressure sensor with ignition on engine off - you should be at zero. If there's only a slight deviation from that figure you could try performing adaptation for that sensor(as if a new one had been fitted)
If its reading high, replace it but not until you've checked point 2.

[IainG]

Hi

2. check the DPF pressure sensor pipes are clear - if you have access to a hand vacuum gauge you shouldn't be able to create any vacuum, if you can it's blocked, clear them out.

Also check the rubber pipes aren't damaged.
Although mine looked intact, one had burnt through (near to the DPF) but looked intact because of the outer protective sheath / covering. It was allowing some pressure to go through to the sensor but not the full pressure. Therefore confusing the system.

[Clan]

Originally Posted by 37 RUBY

Hello Clan

The benefits of main dealer or specialist servicing.

I no longer have a Volvo or Vida so cannot check - Is there anywhere on Vida where the man in the street can check what software is loaded to the relevant modules and if so whether or not its up to date?

No, unless you ask a dealer ... but the engine had several updates after 2012, with the later 2 vale engine ( D4142T) one of which stopped it going into limp mode sometimes when going up a hill in 5th gear about 60 mph and you demand a little more power. the stored code would indicate ECM has wrong software.
As with any diagnostic work the engine must have the latest software... or you could be chasing yourself around in circles getting nowhere.

[37 RUBY]

Originally Posted by Clan

No, unless you ask a dealer ... but the engine had several updates after 2012, with the later 2 vale engine ( D4142T) one of which stopped it going into limp mode sometimes when going up a hill in 5th gear about 60 mph and you demand a little more power. the stored code would indicate ECM has wrong software.
As with any diagnostic work the engine must have the latest software... or you could be chasing yourself around in circles getting nowhere.

It would perhaps be worth one service at the MD for the OP, though I wonder at what benefit if the vehicle ran well to high miles before this point...
I recently found out that within Citroen/Peugeot DPF software there is a theoretical end of DPF life mileage written in, even if it is functioning perfectly well....maybe Volvo software operates similarly.

[Sotosound]

Originally Posted by 37 RUBY

It would perhaps be worth one service at the MD for the OP, though I wonder at what benefit if the vehicle ran well to high miles before this point...
I recently found out that within Citroen/Peugeot DPF software there is a theoretical end of DPF life mileage written in, even if it is functioning perfectly well....maybe Volvo software operates similarly.

O'Rileys Autos have recorded several Youtube videos on this topic. These show how they deal with it.

[37 RUBY]

Originally Posted by Sotosound

O'Rileys Autos have recorded several Youtube videos on this topic. These show how they deal with it.

Mmm, I too saw it on one of Jimmy's video....imagine an unscrupulous or technically poor business who's customer turns up with the "DPF at end of life message"...that's a big bill when in fact if explored properly it might not need to be.

My wife runs a Mini Paceman 1.6d with BMW N47 engine. It's not a nice type of engine - I religiously keep an eye on soot levels, DPF pressure and how often it regens. Touch wood, despite the frequent short journeys my wife inflicts upon it, the DPF system remains healthy. Its run on premium fuel and Redex diesel additive specifically to lower temperatures the soot burns at and once a month I take it out for a good run.

I'm interested to see how the OP gets on though and also why the DPF had to be changed in the first place.

[zaakk]

Originally Posted by 37 RUBY

Hello

Was the replacement DPF OE or copy? It's not unheard of for copies to have pressure readings out of range from new.

What reading are you getting at the DPF pressure switch?
You are looking for less than 10mbar at idle and not raising much higher than 50mbar at 3k rpm.
As well as registering the new dpf was the soot counter zero'd too?

Also an empty dosing tank will trigger limp mode, so a refill of tank & reset of dosing counter plus manually activating the dosing pump to ensure it is running would be worthwhile.

Forced regens are something to avoid. High temps crack DPF's which can be recognised by low pressure readings at raised rpm.

What other DTC codes are logged and return even if cleared?

By way of an update:

DPF pressure sensor reading 5 at idle up to around 47 at idle, so that would seem okay.

Additive tank now at 14/15 and counter reset, though I cannot 'activate' the pump in Vida. Info page says pump only becomes active after adding diesel to fuel tank? Perhaps someome knows more on this but it makes sense to me.

I have also reset counter for new DPF again but couldn't see anything to reset soot counter? I did take a reading of soot mass which was around 1.0g.

Car is now revving above 3k but throws the occaisional EML but no limp mode. Vida says these DTCs are:

MAF reading in range but lower than expected. I have checked everything is 'tight'. Air Filter looks grubby so I'm gonna swap that out and clean MAF.

Other one is DPF efficiency below threshold (Bank 1). Again, going to clean up sensors again. Thought I did this when changing out DPF but must have miised one. If anyone knows which sensor bank 1 relates to that'd be great.

Thanks to all for help so far

[37 RUBY]

Hello
Working down your list then...

Originally Posted by zaakk

DPF pressure sensor reading 5 at idle up to around 47 at idle, so that would seem okay.

Assuming your 2nd figure is at raised revs? then that seems OK.
Have you considered taking it for a run with an assistant and see what figures are shown then? If no assistant, I think there is a live data record facility in Vida

Originally Posted by zaakk

Additive tank now at 14/15 and counter reset, though I cannot 'activate' the pump in Vida. Info page says pump only becomes active after adding diesel to fuel tank? Perhaps someome knows more on this but it makes sense to me

.

Yes, dosing does take place when the system recognises fuel was added. There will be a manual activation but for now you could just monitor the level via Vida to confirm pump is work...arguably the fact it was empty suggests its fine.

Originally Posted by zaakk

I have also reset counter for new DPF again but couldn't see anything to reset soot counter? I did take a reading of soot mass which was around 1.0g.

Seems fine so no action needed. Likely that the registering of a new DPF also zero'd the soot levels.

Originally Posted by zaakk

Car is now revving above 3k but throws the occaisional EML but no limp mode. Vida says these DTCs are:

MAF reading in range but lower than expected. I have checked everything is 'tight'. Air Filter looks grubby so I'm gonna swap that out and clean MAF.

I am of the opinion that MAF's do wear out, so it could be ready for cleaning or replacing. They don't usually trigger EML's and if you unplug it then start the car, the system will register such a code but no EML as the system will revert to some baseline settings to keep running. You could in fact unplug it and take it for a run and see if your symptoms still persist.
Are they the only DTC's ?

Originally Posted by zaakk

Other one is DPF efficiency below threshold (Bank 1). Again, going to clean up sensors again. Thought I did this when changing out DPF but must have miised one. If anyone knows which sensor bank 1 relates to that'd be great.

Bank one is upstream of the DPF. If you can afford it change it as it was running in the same conditions as the old DPF. If your car is out of date for the software updates, the advice from 'Clan' is key here though. New sensors may work best with updated software.

Bank 2 is downstream of the DPF and reports conditions after filtration, such as if soot is getting past, ie cracked DPF from too many/wrongly applied forced regens. You tend to get soot in the rear tail pipe when that happens.

Out of interest, why did you change the DPF?

[zaakk]

Originally Posted by 37 RUBY

Hello

Out of interest, why did you change the DPF?

At the time (Before I had Vida) everything in my limited knowledge was pointing to a clogged DPF, the car is close to 100k, 12 years old too so it seemed like the right thing to do. With hindsight I might have held fire. I've still got old DPF, so I may run some off car cleaner through it, stick it back on and go from there. My driving at the moment is not suited to a diesel, lots of short trips but as my 3 pot Focus's so called 'Lifetime' wet belt let go at 90k miles its a case of needs must.

[zaakk]

Originally Posted by 37 RUBY

Hello

Bank one is upstream of the DPF. If you can afford it change it as it was running in the same conditions as the old DPF. If your car is out of date for the software updates, the advice from 'Clan' is key here though. New sensors may work best with updated software.

I had a similar issue with the upstream sensor on my Focus (CAT as opposed to DPF), cleaned that and all was well, so a repeat performance may be in order!

Thanks again for all the help/advice.