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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand
DPF failure to regenerate - AGAIN!! (AND AGAIN!! UPDATE)

Thought I'd start a new thread on this old topic!!

Car was DPF force regenerated and new inlet manifold at 100,000 miles. Has worked fine since then, regened fine etc. Now on 101400 miles. Has done a couple of trips a week (12 miles) on motorway/dual carriageway. just had an amber DPF light on and Iid showed level of 23.8g.

Had two trips on motorway today to regenerate: neither worked. What is interesting though is the number of demanded regens - over 5,000 regeneration demands in a day!! I could actually see the figures go up in leaps of 30-40. Attempted a regeneration on motorway tonight and the exhaust temp got to 575 degrees before peaking and then lowering - no regeneration completed.

The car is obviously trying to regeneration but it won't allow it for some reason. Software update required?

Thoughts? Here are the figures/IID screen shots from this morning.

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Last edited by Dolphinboy on 25th Jul 2020 1:30pm. Edited 2 times in total

Post #557958 16th Jun 2020 11:07pm
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

Then this evening's figures!!

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Post #557960 16th Jun 2020 11:10pm
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DrRob



Member Since: 16 Apr 2015
Location: Petersfield, Hampshire
Posts: 4204

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

Have you checked (again) the usual inlet suspects? The throttle body seems to be emerging as another one. I'm told by an ex LR mechanic that the seal and spring wear with age. There's a couple of threads on it as you probably know. Perhaps look at it for soot, looseness and fit? Perhaps try the PTFE trick?

Might be worth another high pressure smoke test too 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
New Defender D300 90 on order so "Rory" will be going to a new home....!
1974 Series 3 Lightweight = "Millie"
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Post #557971 17th Jun 2020 7:06am
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GGDR



Member Since: 26 Nov 2016
Location: London
Posts: 3517

United Kingdom 2011 Range Rover Vogue SE TDV8 Stornoway Grey

Shame your issues have returned Dolphin

I bought a DPF Dongle and it's been a lot easier to manage regenerations.

http://www.diagnostic-associates.co.uk/dow...0DPFDR.pdf

Apparently (unofficially) JLR use these because new cars can idle too long, on and off transporters etc.

But if you have had a sudden soot increase you may have a new leak somewhere else.
So I agree with what DrRob says. The seal (intercooler to throttle body pipe) is suspect. Clip too.

Also check and clean your MAP and MAF sensors

Also the CSOV valve.

Don't forget your fuel level must be more than 25% - and use cruise control too.
The ECU is very fickle about parameters and if it's not completely happy it will stop the regeneration.

That's where the DA Dongle helps, fuel aside once you force it to regenerate it will regenerate, even if you slow right down which happened to me when I hit traffic once.

.
. Cheers, Greg
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2011 Vogue SE 4.4 with lots of toys in Stornaway

Post #557977 17th Jun 2020 7:49am
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DrRob



Member Since: 16 Apr 2015
Location: Petersfield, Hampshire
Posts: 4204

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

Take off the throttle body plastic pipe and see if its oily and sooty underneath on the OUTSIDE of it. Or get a white tissue and wipe underneath it in situ as a first test 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
New Defender D300 90 on order so "Rory" will be going to a new home....!
1974 Series 3 Lightweight = "Millie"
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Post #558000 17th Jun 2020 10:44am
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

Hi chaps, thanks yes will do all those things you suggest.

However it’s not a sudden rise in soot that’s the problem - it’s the fact that the car is attempting to actively regen but something is not allowing it to. The soot levels were being lowered normally up to now. I even gave up monitoring them on the IID as everything’s was as it should be.

That’s why I was thinking it may be software - the evoque and disco sport forums are full of this dpf and oil dilution problem and some had a software update to help.

Post #558004 17th Jun 2020 11:22am
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DrRob



Member Since: 16 Apr 2015
Location: Petersfield, Hampshire
Posts: 4204

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

Any fault codes stored? 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
New Defender D300 90 on order so "Rory" will be going to a new home....!
1974 Series 3 Lightweight = "Millie"
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Post #558006 17th Jun 2020 11:42am
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

none (just like when it went red).

Post #558018 17th Jun 2020 1:17pm
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

Right, haven't had a chance to get a clear look under the bonnet due to weather (torrential) and time (scarce).

However have had a chance to look for other causes and I have come to the conclusion that it is not regenning because the exhaust temps are not getting high enough. Causes could be:

1. Faulty EGR valve (stuck/remining open?)
2. Throttle body not closing to minimise air intake onto cylinders. Poss wear of clip and spring?
3. Faulty sensor (replace only 2 months ago so not likely to be a cause)

Anyone any other comments or mechanical knowledge? I have seen a few comments that the EGR won't affect the DPF?

Thx all
DB

Post #558066 17th Jun 2020 8:25pm
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Range Rover L322



Member Since: 03 Sep 2019
Location: South West
Posts: 303

United Kingdom 

Hi DB.

Right. Fresh set of eyes on this.
My immediate concern would not be the traditional and well-known solutions to the DPF soot-fill problem but the astonishing amount of Demanded Regenerations you have been experiencing. We know the "Regens Demanded" number and function to be usually robust, reliable and work universally - but we have not seen this frequency of Demanded Regens before in any scenario.

That should be your starting point, and I think you need a specialist to take a look at it because it sounds electronic.

Incidentally, I might be wrong but if memory serves me correctly, I dont think the fields "Incomplete Regens" or "Successful Regens" populate correctly. I'm fairly certain I discarded them early.

All the best,






.


Last edited by Range Rover L322 on 17th Jun 2020 10:27pm. Edited 4 times in total

Post #558070 17th Jun 2020 9:17pm
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GGDR



Member Since: 26 Nov 2016
Location: London
Posts: 3517

United Kingdom 2011 Range Rover Vogue SE TDV8 Stornoway Grey

Lost a few posts here....?

. Cheers, Greg
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2011 Vogue SE 4.4 with lots of toys in Stornaway

Post #558072 17th Jun 2020 9:21pm
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

@RRL322, I think you may be right. It was trying to regen but was being hindered. It may be an EGR temp sensor fault not allowing the exhaust to get hot enough to regenerate.

The 5,000 attempted regens should ring alarm bells at the LR dealer so will see what they say. Will update when I can.

Thanks all.

Post #558074 17th Jun 2020 9:39pm
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DrRob



Member Since: 16 Apr 2015
Location: Petersfield, Hampshire
Posts: 4204

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

I think in this instance it's a main dealer plug in and assess jobby Thumbs Up
Keep us posted and I'm sure it'll be sorted soon Thumbs Up
My money is on the sensor Whistle 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
New Defender D300 90 on order so "Rory" will be going to a new home....!
1974 Series 3 Lightweight = "Millie"
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Post #558090 18th Jun 2020 7:11am
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

rob, Sensor was changed 1000 miles ago (if you mean the rear DPF sensor). Or do you mean the EGR temp sensor?

Main dealer can't get me in for a month!! Evil or Very Mad They are open for business but most of the staff (including the Chief Technician) are furloughed! How can that be possible?

Anyhow, going to let someone (non-LR) look at it who seems quite knowledgable about DPFs and LR mechanics in general

The fact that I don't have any fault codes leads me to think it's not a mechanical failure (EGR etc).

Post #558107 18th Jun 2020 10:30am
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stan
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Craig is only up the road from you , can he not sort it.. ... - .- -.




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Post #558113 18th Jun 2020 11:10am
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