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Home > Technical (L322) > Number of Demanded Regenerations - anomaly / figure jumping

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Range Rover L322

Member Since: 03 Sep 2019
Location: South West
Posts: 330

Number of Demanded Regenerations - anomaly / figure jumping

So… I did 400 miles in the Range Rover over the weekend. It didn't miss a beat.
There are, however, a few odd things going on. I suspect they are Land Rover “anomalies”, but I wanted to run them by the Forum in case anyone has any ideas and to flag it for others.

The Field "Number of demanded DPF regens” is usually reliable and accurate. I have watched it for 5 years!.
Recently, on two occasions, the figure has jumped inexplicably.
Firstly from 151 to 240 then from 243 to 453 while regenning (mileage also highlighted)
It has never done this before.

There is no problem with the car (it is running great) and the DPF Sooting, while slightly more than usual is all close-ish to perameters. TBH few other people will ever notice this.

My questions are:
1) Should I just this down to being a Land Rover-esque glitch and ignore?
2) Do you have any ideas?
3) Would it be worth flashing the ECU at some point in the future?
4) Should l just shut up and drive it?

All the best,

Matt 2012 L322 4.4 TDV8 AB low mileage - a peach
1986 V8 Defender 90 County ex-Swiss Army - Red everything....

My preferred Independent: Roy Hardy. R & B AUTOS LTD, 20 Brook Road, Wimborne, Dorset, BH21 2BH 07500 866775‬ (Ex LR Chief Technician)

23rd Jul 2024 8:45am

Baltic Blue

Member Since: 13 Aug 2015
Location: North Wales
Posts: 3788

2011 Range Rover Vogue SE TDV8 Baltic Blue

I have always read your DPF related posts and respected your opinions.
We all know how addictive DPF watching can become, but I view keeping an eye on soot levels as good practice.
So,
1) Yes
2) No
3) Definitely NO
4) Yes.

Cheers
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.
https://www.fullfatrr.com/forum/topic56162...tty+affair

23rd Jul 2024 9:06am

steve916s

Member Since: 23 Oct 2023
Location: Wantage
Posts: 2

2012 Range Rover Westminster TDV8 Santorini Black

I can beat that!
In June my Demanded Regens jumped from 990 to 1356.
Regens have been happening normally for the last 5000 miles.
I've had the car less than a year. 125,000 miles 2012 4.4 tdv8.
No problems at all other than the P040D-00(2F) which I will get round to doing one day.
I'm not too worried about it.

23rd Jul 2024 9:18am

Range Rover L322

Member Since: 03 Sep 2019
Location: South West
Posts: 330

Baltic Blue wrote:
I have always read your DPF related posts and respected your opinions.
We all know how addictive DPF watching can become, but I view keeping an eye on soot levels as good practice.
So,
1) Yes
2) No
3) Definitely NO
4) Yes.

Cheers
Mike.

haha brilliant answer - also Dr Rob concurs - thanks Mike!

. 2012 L322 4.4 TDV8 AB low mileage - a peach
1986 V8 Defender 90 County ex-Swiss Army - Red everything....

My preferred Independent: Roy Hardy. R & B AUTOS LTD, 20 Brook Road, Wimborne, Dorset, BH21 2BH 07500 866775‬ (Ex LR Chief Technician)

Last edited by Range Rover L322 on 23rd Jul 2024 7:42pm. Edited 2 times in total

23rd Jul 2024 7:41pm

Range Rover L322

Member Since: 03 Sep 2019
Location: South West
Posts: 330

steve916s wrote:
I can beat that!
In June my Demanded Regens jumped from 990 to 1356.
Regens have been happening normally for the last 5000 miles.
I've had the car less than a year. 125,000 miles 2012 4.4 tdv8.
No problems at all other than the P040D-00(2F) which I will get round to doing one day.
I'm not too worried about it.

This is helpful, thank you! If anyone else sees jumps like this, it would be good to know as well.

. 2012 L322 4.4 TDV8 AB low mileage - a peach
1986 V8 Defender 90 County ex-Swiss Army - Red everything....

My preferred Independent: Roy Hardy. R & B AUTOS LTD, 20 Brook Road, Wimborne, Dorset, BH21 2BH 07500 866775‬ (Ex LR Chief Technician)

23rd Jul 2024 7:41pm

steve916s

Member Since: 23 Oct 2023
Location: Wantage
Posts: 2

Well, this is getting interesting!
After a 400 mile round trip to Bradford up the M1, the Demanded Regens has jumped from 1356 to, wait for it, 2489.
Is this a record?
Will it get to five figures?
Is something Bad about to happen?
Will keep you posted...

30th Jul 2024 3:12pm

Dolphinboy

Member Since: 07 Dec 2009
Location: Bristol
Posts: 3196

the only time my demanded regens went up by over 1000 a day (sometimes) was when I had my inlet manifold replaced (was cracked, leading to RP) and they cracked the thermostat housing which made the engine run too cold (fan was on most of the time - I could hear it.) to complete a regen sequence.

These engines run cool anyhow and so it was unable to get to temp a lot of the time to complete a full regen.

Replaced the housing and all has been good for over 3 years and 1,000s of miles.

30th Jul 2024 3:35pm

JayGee

Member Since: 27 Jul 2021
Location: London
Posts: 3283

2012 Range Rover Vogue 4.4 V8 Orkney Grey

I can only assume that if some parameter is preventing a regen then the ECU just keeps on putting in the request until the parmeters are met. This may be an anomoly of the GAP tool as number of completed regenerations should be the reliable figure rather than demands. 2012 TDV8 Vogue (L322)

31st Jul 2024 7:08am

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