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Gal Dove

Member Since: 22 Jan 2022
Location: South Wales
Posts: 70

2014 Defender 110 Puma 2.2 USW Corris Grey

DPF re-gen / software update?

Hi all.

MY 2014 PUMA 2.2, 110 Utility, 28k miles.
I appreciate that there are a number of threads regarding the DPF re-gen issues on here but I'm not sure whether I am missing something as my issue seems excessive. I'll be as brief as I can:

I only do a few thousand miles per year, almost all of these are at urban A Road speeds, which in Wales are mostly 20mph. I'm used to extinguishing the Oil Service message myself and do this whenever I (DIY) change my oil and oil filter - and sometimes in between changes, if this is necessary.

I changed the oil & filter back in March this year. This was around eight months after I'd previously changed it - so not even a year and only a few thousand miles - maybe 2k miles at most. I did this change as I'd had the Oil Service message flag up and thought that it was wise to do it anyway.

During the next few months (May / June) I noticed that the engine was (possibly) trying to initiate a DPF re-gen. To be clear; I'm saying this as the engine note would change and there'd be a slight 'hiccup' or surge in the revs also. My journeys are very regular and always take the same route. It got to the point where I could pretty accurately predict where in the journey that this would happen.

I assumed that these events were attempted DPF re-gens so I drove to a dual carriageway and drove at around 50mph for about 20 mins. This seemed to cure the issue and I noticed that what I think were attempts at a DPF re-gen were not occurring during the same regular journeys that I made daily.

Then the issue returned around August time, so I dumped the oil & filter after just 1k miles since March. All has been well until this week where I'm now getting the exact same symptoms in exactly the same part of my daily journey - I've also got the Oil Service message just come back on today.

I'm certainly not planning on doing what would effectible be my third oil change in a year, so I'm trying to get the following questions answered.

1. The engine symptoms as described above (slight hiccup & surge) then the engine adopts a different tone - only way I can describe this is as if the engine is running slightly below the surface of water - weird, I know - but that's the only way that I can describe the sound. Is this an indiction of an attempted DPF re-gen?

2. If the answer to the above is yes, then do I need to get some sort of software update from JLR - or can I get this from my indi? (Worth mentioning that I've owned the car for six years and have never been near JLR with it.)

3. Given that I rarely do journeys that would allow a full DPF re-gen - would it be advisable to ask my indi to initiate a stand-still DPF re-gen by plugging into the ECU? Is this ok or does it shorten the life of the DPF?

Any help or advice would be greatly appreciated.

26th Sep 2024 6:17pm

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 509

Well I've aired my views on the other thread so here's my thoughts on yours..
It's quite possible it is trying to regen more frequently because of the soot load..as I said in the other thread the best indication if you are unsure is to try an app that allows exhaust gas temp to be monitored..you will have 3 temp sensors and I'm pretty sure two of them can be monitored by the likes of the torque app..
Trouble is once the ash build up gets excessive then there is less tolerance to soot load..hence the more frequent attempts to regen...the ash build up would be the result of all the regeneration attempts to clear or burn the soot..the ash would require removing mechanically...
They reckon the best way to sort a high ash level is a dpf removal and proper clean, but some offer in car treatment through sensor holes..not sure how that removes the ash but it possibly does clear the soot..
That should get you back to less frequent attempts to regenerate the dpf..
Perhaps speak to firms that offer the service and see what they say ..
Again ideally you could have data on your differential pressure sensor before and after as an indication of the worth of a clean..

26th Sep 2024 8:01pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 1981

This topic is worth a read. Especially 4 post down on page 2

https://www.defender2.net/forum/topic71245...p;start=15

26th Sep 2024 8:17pm

Rashers

Member Since: 21 Jun 2015
Location: Norfolk
Posts: 3483

If you are in South Wales, and I know you said you are not planning on going far, but would it not be worth getting on the M4 Motorway and head for the Severn Bridge. By the time you get over the bridge the engine will be up to temperature and it will have probably regen’ed. (I’m sorry, it’s been a while since I last went to Bridgend. Not sure if the politicians have dropped the M4 speed limit to 20mph as well - although I remember some Friday nights, getting to 20mph would have been aspirational!)

I have a 2014 Puma and I am paranoid about this particular problem. I always try and take a ride out once a month to get everything nice and warm. My issue is unlike your obligatory speed limits, all of our main roads have roundabouts be that the A47, A11 or A140. The A14 in Suffolk is our nearest open road and depending on the traffic, it can sometimes be difficult to maintain a good speed in the traffic!

26th Sep 2024 8:33pm

Julie

Member Since: 07 Oct 2017
Location: Nantes
Posts: 472

2012 Defender 110 Puma 2.2 SW Keswick Green

Re: DPF re-gen / software update?

Gal Dove wrote:
Hi all.

MY 2014 PUMA 2.2, 110 Utility, 28k miles.

Any help or advice would be greatly appreciated.

28k ? Honestly ?

I'd havé thé 2 DPF pressure sensors checked ( in &. Out )

27th Sep 2024 4:33pm

BrickBox

Member Since: 05 Oct 2021
Location: Wales
Posts: 807

2008 Defender 110 Puma 2.4 USW Zermatt Silver

Oil dilution is always going to be a problem for you with so little miles and lack of high speed runs. 2008 2.4 110 Utility Station Wagon XS.

27th Sep 2024 6:22pm

Gal Dove

Member Since: 22 Jan 2022
Location: South Wales
Posts: 70

Hi.

Thanks for all the replies so far. There's one other question that I'm not 100% clear on.
I've mostly read that the car has to be travelling at over 30mph in order to maintain a regen.

However, I've also read that there's possibly a way of achieving this by putting the gearbox into low range and then driving it. This makes sense to me as I would have thought that the higher that the revs are the more pressure that is then being put through the DPF(?).

I'm guessing that this might not be being suggested by JLR as there might be risks associated with driving at 'speed' in low range...?

29th Sep 2024 1:45pm

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 509

It's not about speed or low range or pressure in the dpf..it's about loading the engine so that the exhaust gas temp are higher and the engine is at full operating temp and can be maintained like that for a period of time..
I'm not saying it is the case but if someone said that regens were not allowed if the ecu knows low range is been engaged I'd believe that..
A good run in a higher gear with a reasonable load would facilitate the optimum conditions I think..that's when the engine temperature is at it highest..

29th Sep 2024 2:54pm

Gal Dove

Member Since: 22 Jan 2022
Location: South Wales
Posts: 70

Thanks, Andy. I'm reading that engine load seems to be a factor ...which is a bit odd as I regularly pull my daughter's horse around in an Ivor Williams trailer (

) (circa 1.5 tons in total) - which I'm assuming could be beneficial - as long as I maintain 30mph+ !!

29th Sep 2024 2:59pm

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 509

Sounds 👌, if you can be maintained for long enough..
Iyt was mentioned above..it's low milage but I suppose it might be worth seeing about a removal and clean if nothing else resolves the frequency of the attempted regens..👍

29th Sep 2024 3:27pm

Gal Dove

Member Since: 22 Jan 2022
Location: South Wales
Posts: 70

Ok thanks again.

Going back to my original post - do you think that there's any value in finding our whether there have been any software patches or updates (I can't believe that what is essentially an agricultural vehicle would warrant something like this mind!) from JLR in the last 5 years or so...? As I say, I've not had the car serviced by them since I've owned it and I've either done most of it myself or taken it to my indi. Thanks.

29th Sep 2024 3:31pm

Rashers

Member Since: 21 Jun 2015
Location: Norfolk
Posts: 3483

As far as I am aware, JLR have mostly washed their hands of the old Defenders after production ceased. I wasn’t aware that there had been any manufacturer upgrades to the ECU.

Unless anyone else knows otherwise?

29th Sep 2024 4:57pm

Julie

Member Since: 07 Oct 2017
Location: Nantes
Posts: 472

There were some upgrades in 2013 / 2014 which may concern a MY 2014

23rd Oct 2024 7:31pm

Gal Dove

Member Since: 22 Jan 2022
Location: South Wales
Posts: 70

Hi Julie,

Many thanks. Is this something that I'd have to go to JLR in order to get or can this be done via 'after market'?

23rd Oct 2024 8:04pm

Julie

Member Since: 07 Oct 2017
Location: Nantes
Posts: 472

If you serviced your truck, the ECU would have been updated. The updates are in the records of JLR. Just give them a call ...

23rd Oct 2024 8:21pm

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