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Range Rover L322



Member Since: 03 Sep 2019
Location: South West
Posts: 199

United Kingdom 

Hi Kevin,

Here's an excerpt from the Workshop Manual:

"Active regeneration generally occurs every 250 miles (400 km) although this is dependant on how the vehicle is driven. For example, if the vehicle is driven at low loads in urban traffic regularly, active regeneration will occur more often. This is due to the rapid build-up of particulate in the DPF than if the vehicle is driven at high speeds when passive regeneration will have occurred.

The DPF software incorporates a mileage trigger which is used as back-up for active regeneration. If active regeneration has not been initiated by a back pressure signal from the differential pressure sensor, regeneration is requested based on distance travelled."

I'm not certain how you have been measuring your regens, but without an IIDTool you wouldn't ever know if they are going on (note "Successful Regens" is not a robust field while "Demanded Regens" is. The car will run regens even if it doesnt need it.
I am guessing you might be referring to a Yellow Warning light.

The type of oil used in your car will not affect DPF performance, rather the DPF regens will affect the oil as there is a dilution figure. It is worth noting this dilution figure is inferred and calculated by number of regens rather than measured so it's a bit tricky to interpret that figure and take action based upon it.

Hope that helps!...


Last edited by Range Rover L322 on 25th Nov 2021 10:23pm. Edited 3 times in total

Post #613733 24th Nov 2021 10:22pm
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RRDunc



Member Since: 26 Feb 2020
Location: Leicestershire/Warwickshire border
Posts: 459

England 2012 Range Rover Autobiography TDV8 Santorini Black

That is probably the most helpful explanation of DPF regens that I've seen.

Thank you.

Dunc. The life you have is the only one you'll get; make the most of it.
--------‐--‐-----------------‐------------------‐---------------------------------------------------
2012 4.4 TDV8 L322 Autobiography

Post #613735 24th Nov 2021 10:52pm
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kevinp



Member Since: 28 Sep 2019
Location: Telford
Posts: 479

United Kingdom 2011 Range Rover Autobiography TDV8 Santorini Black

Ah ha. Very interesting mate and yes I was on about the yellow warning light. I have got an IID tool but I tried to get the DRL's working once and loads of other things stopped working so I don't use it very often. Rolling with laughter And the DRL's didn't come on either Big Cry

Post #613737 24th Nov 2021 10:56pm
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DrRob



Member Since: 16 Apr 2015
Location: Hampshire
Posts: 2920

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

Range Rover L322 wrote:
The best advice was from Dr Rob which is not to worry too much unless you are not getting Yellow warning light. .

I think you mean "don't worry too much unless you ARE getting a Yellow warning light" Thumbs Up
An IID can send you bonkers Rolling with laughter 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory interior and clear glass = "Rory"
1974 Series 3 Lightweight = "Millie"
--------------------------------------------------
2012 SDV6 Range Rover Sport - gone
2012 Freelander - gone
1993 200 Tdi Range Rover Classic - gone after 14 years rolling restoration "Rangie"
Series 2A V8 Lightweight - gone
1952 80" - gone
1949 80" - still in family since 1975

Post #613752 25th Nov 2021 8:59am
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Range Rover L322



Member Since: 03 Sep 2019
Location: South West
Posts: 199

United Kingdom 

haha !! editing Rolling with laughter

Post #613841 25th Nov 2021 10:20pm
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Smitch



Member Since: 05 Oct 2021
Location: North west
Posts: 20

United Kingdom 2012 Range Rover Westminster TDV8 Stornoway Grey

So the issue is still not resolved, only getting 30 miles max from an indicated zero burn 😭 I’ve got it booked into a specialist who is going to check all the dpf related parts and perform a high pressure smoke test.

There is no evidence of soot around the new short pipes or throttle body hose and I visually checked the plenum seams when it was off, additionally I wiped down all seams and pipes etc and there are no traces of soot after driving.

Not disregarding another leak but here’s some Food for thought:

We’ve only had the car since October and it’s been out of service for the majority, the only time we’ve used it was to go over to and around Ireland so 2k of fast road driving meaning we probably wouldn’t have got an error as it regenerating correctly (approx 20g). Looking at the state of the throttle body hose it’s been leaking a long time so even if we limited it to the time I’ve had it that’s 2k miles of operation.

If the car has been regenerating as frequently as I’m seeing then over that 2k the car has potentially regenerated 66 times which adds around 16k’s worth of normal regeneration on top of the 100k it’s already had. This 16k could be potentially be doubled or tripled dependant on how long the leak was present with the previous owner.

Very crude maths but essentially the actual mileage on the dpf far exceeds the indicated and with a DPF designed to eventually fail due to ash mine could very well be on that threshold.

Will update on Wednesday 👍🏻

Post #613873 26th Nov 2021 2:11pm
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Range Rover L322



Member Since: 03 Sep 2019
Location: South West
Posts: 199

United Kingdom 

Ash in the DPF has not presented enough substantial and robust evidence as a cause, and most likely not enough to give you that regen frequency on open road driving.

If you would like to have a call and a chat about it, PM me. There is quite a lot of nonsense posted about DPFs, not least the value in things like cleaning them and Terracleaning the engine.

Conversely, the high pressure smoke test will give you a binary result. This is your best next move.

It all gets quite frustrating, and it's easy to drive yourself mad trying to figure it out. I once even gave a mate an old DPF that I knew worked and he bolted it on, as usual it wasnt the DPF, something else entirely. He drove 13 hours round trip to collect that. I reckon the high pressure smoke test will give you a result. If it doesnt you could pick up a second hand DPF and try that to elimiate that as a problem. The DPFs do not really break: as I mentioned before I have been into this really deeply. Incidentally the car that had the DPF replaced been driven through a deep saltwater ford then left to stand and the DPF surface had been compromised was one which had a DPF made during a period when Ford was using poor quality steel from China in late 2011-2012. That's how far down the rabbithole I have gone into this. I found that out from a guy who has personally had about 40 Land Rovers and builds them as his day job.

So mate, don't worry, we will figure this out.



.

Post #613927 27th Nov 2021 12:18am
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Smitch



Member Since: 05 Oct 2021
Location: North west
Posts: 20

United Kingdom 2012 Range Rover Westminster TDV8 Stornoway Grey

Thank you ☺️

One thing that’s been mentioned to me is the CSOV, I’m not sure if this will cause issues?

I’ve read a few threads and been able to identify where it is and that it is the newer design without the nut. I also read that it can be tested by “making contact” I asked my wife to hit the start button whilst I was peering down and I’m not seeing any movement although I’m not sure I was looking at the right bit. ( I was looking at the arm that’s shown in this pic)




Did a couple cycles and deffo no movement or sound in that area although plenty of white and clicks in other areas.

I don’t have any engine faults and RP mode has gone since I changed the pipes.

Post #613948 27th Nov 2021 10:44am
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Baltic Blue



Member Since: 13 Aug 2015
Location: Conwy North Wales
Posts: 3173

United Kingdom 2011 Range Rover Vogue SE TDV8 Baltic Blue

If it is the modified arm with no nut on the top it should be fine.
It doesn’t move until the revs reach 2,500 rpm when the second turbo is called for.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.

Post #613954 27th Nov 2021 11:31am
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