 | Home > General & Technical (L663) > DPF cycles - what is normal?? Advice needed! |
 
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 3005  
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That's not normal at all. My DPF regeneration occurs once every few days (all my driving is local)
D250 same as yours. During the regeneration the MPG is indeed trashed, and it lasts 20 minutes. But l only get one every so often. And l use the vehicle all day every day. lt sounds like your regeneration isn't completed so it keeps trying again. When the regeneration starts, do you let it finish? lf you don't it will try again next time you use the vehicle. On mine l don't need to drive in a particular way to allow the regeneration. lt will complete even if l am sat in slow moving traffic. Try calling out Land Rover Assist. l have found them to be very good. |
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30th Dec 2024 1:25pm |
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| Soup Dragon Member Since: 22 Sep 2023 Location: Cheshire Posts: 92 
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Thanks Lightning, useful to know and I appreciate sharing your own experience.
I called Land Rover Assist and one of their senior technicians will call round tomorrow morning. Let’s see what they have to say! |
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30th Dec 2024 7:40pm |
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| Soup Dragon Member Since: 22 Sep 2023 Location: Cheshire Posts: 92
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So had the LR Assist person visit this morning:
- he can find no recorded fault when plugging in his laptop. Without this, he’s not able to take any further action - he did perform an engine reset of some kind (on his laptop) which should restore everything engine related back to factory settings, I’ll know in the next few days if that’s made any difference. - he suggested it might be worth filling up with high octane / super diesel to see if that helps (especially after the engine settings reset). Also to try fuel additive (Millers or equivalent). I suspect both measures would improve fuel consumption (at a cost) but I’m skeptical whether it would fix the DPF issue. Worth a try? The DPF unit is hard to access - LR Assist guy thinks it might be a case of engine out. So if they agree to do this and find no fault that can be claimed under warranty, then I’m liable to be charged a four figure amount? Would be cheaper to ignore and accept poor mpg! Next steps 1. Wait to see if the engine reset has cured the issue (not holding my breath) 2. Try super diesel and additive for a few weeks 3. Contact dealer and ask them to take another look. I suspect without a fault being registered, we’ll be going around in circles - even if I take the technician for a drive and show him when the regen is happening. 4. If still no joy, contact JLR Customer Services. I looked online - the AA state regen should occur every 300 miles. Mine occurs every 15 miles so 20x more frequently… Lesson learnt - don’t buy a JLR diesel. I accept mine might be quite a rare fault but would not want to go through the same experience again. |
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31st Dec 2024 11:28am |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 3005
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Have you got the Land Rover Remote app for the vehicle. What does it say under "DPF". Does it say "clean & efficient"?
 Click image to enlarge |
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31st Dec 2024 12:11pm |
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| Soup Dragon Member Since: 22 Sep 2023 Location: Cheshire Posts: 92
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Hi Lightning, yes that’s the message I have too - clean and efficient. Which clearly is not the case. If the sensors are not picking up a problem, then as far as the car / App is concerned (and therefore the dealer), there is no problem.
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31st Dec 2024 1:11pm |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 3005
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Set your MPG to "average" and see what it records over a few days. My guess is it will be under 20mpg (my average in local driving is 26)
lf you are below 20mpg that's a case for returning the vehicle to the dealer as it's clearly showing a there's an issue with it. An alternative would be to take the vehicle to an independent Land Rover specialist and get them to have a look at it. l see you are in "Cheshire" There's a very good one in Hayfield called Hallam Brothers. (not Jim Hallam in Leek) My guess is, that some sensor is not working or has not been connected as it's done it since new. So it's constantly telling the ECU to regenerate the DPF The DPF is almost certainly "clean & efficient" in fact you'll probably have the cleanest DPF in town. |
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31st Dec 2024 1:26pm |
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| barbel jim Member Since: 12 Dec 2012 Location: Northants Posts: 1435 
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No I think I have the cleanest DPF in the uk!
I know it’s not the same vehicle but I’m currently having this issue or similar on my 4.4 sport. The short answer is no it shouldn’t be doing a regen that often. Mine appears to be constantly. After some persistence with my main dealer service manager, and basically backing him into a corner, he’s agreed to an investigation, fixed price. Nothing shows on the electrical side, plugged in diagnostics show everything normal, so basically there’s an underlying fault. Consensus of opinion is overfueling probably caused by an air leak, which in turn means more soot produced hence all the regens. Mine has been highlighted by the service due counter tumberling. Eg yesterday the wife’s commute 27 miles reduced the service due count by 451 miles  interesting though, although she’s done another 70 miles, the service due hasn’t moved !!! It’s only done 2000 miles since they serviced it end of November. In control app shows clean and efficient, with no issues. It’s booked in 14th jan so we’ll see what they find.
Reading many other posts on the subject, split intake hoses have been mentioned more than once. I think you should be back at the dealers door…. Yes potentially expensive, but LR will not give you any gesture if you don’t go through the motions |
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31st Dec 2024 1:48pm |
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| Gareth Member Since: 12 Dec 2011 Location: Woodford Posts: 1125 
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I think you should be keeping a fuel log. Record brim to brim and miles actually driven over a period of time. Fuelly app is useful for this. 2021 Defender 110 X-Dynamic HSE D300 MHEV
1966 S2a 109 aka Betsy |
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31st Dec 2024 2:35pm |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 3005
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A DPF regeneration takes around 20 minutes on mine, when it happens (slightly higher idle speed is the only real indicator)
lt happens once every few days of local driving, around every 100 miles. |
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26th Jan 2025 2:04pm |
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| Soup Dragon Member Since: 22 Sep 2023 Location: Cheshire Posts: 92
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Well I think I’ve cracked it!
Went back to my dealer today for the second time to see if they could fix the DPF issue. A quick recap: - They couldn’t find anything on the first visit due to no fault codes showing up - I then called out LR Assist to see if they had any ideas - same story, no fault codes so can’t do anything - Spoke to the Service Manager. Explained the issue in detail. He gave me the impression that he didn’t believe me and suggested it was my driving style, too many short journeys bla bla and “you’re lucky to get 32mpg” - swapped to Super Diesel ever since but it’s not made much difference This time when I dropped the car off today I spoke directly to one of their senior technicians and he took a real interest. He’d not seen this before but I knew he was going to be much more methodical / forensic. The outcome: - the issue was caused by a split air intake hose where it goes into the airbox, this would have been faulty at the factory. This made things too hot, causing a build up of soot, hence the excessive DPF regens. The air leak was messing up the correct air:fuel mixture but wasn’t enough to trigger a sensor - the technician was also able to download a lot more data to show when the car was doing a DPF cycle, it backed up my own observations about it occurring every 20-30 mins - A nice surprise was that I received a £150 hotel voucher for the trouble I’d been put through, which was a nice gesture and other dealers may not have been so generous! I feel vindicated. After many months of waiting for a resolution, I’m now able to get a decent mpg out of the car. It’s probably cost me £500 in extra diesel. |
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6th Mar 2025 9:36pm |
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| DrRob Member Since: 29 Mar 2017 Location: Hampshire Posts: 239
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Result
Glad to hear there are still some decent technicians out there with a customer focus  MY25 90 D350 X-Dynamic HSE in Silicon Silver and coil sprung
1974 Series 3 Lightweight = "Millie" Many Range Rovers and Land Rovers over the years 😂 1949 80" - still in family since 1975 |
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6th Mar 2025 9:47pm |
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| DFNDER Member Since: 02 Oct 2023 Location: Perth WA Posts: 140 
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Good result, well done for persevering and that the tech actually wanted to help.
Split intake hose / ducts are more common than not, these parts are usually rigid plastic, installed cold and clamps done up by electric or powered drivers, leading to cracks etc. |
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7th Mar 2025 1:13am |
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