Home > Maintenance & Mods (L322) > What to do if your DPF is blocked... |
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JayGee Member Since: 27 Jul 2021 Location: London Posts: 3243 |
Same with me - never had a DPF warning in over 2 1/2 years and just past 170k miles 2012 TDV8 Vogue (L322) |
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12th May 2024 4:30pm |
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Range Rover L322 Member Since: 03 Sep 2019 Location: South West Posts: 329 |
The paddle shift / Sport mode / keeping revs increased will not help keep your DPF cleaner. The only remedy is a long run. When you are over 19.7grams it will try and regen more frequently until it gets rid of some soot. There are some other perameters you need to meet: 1) Driving over 37mph. 2) Tank more than a quarter full. . 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 12th May 2024 9:00pm. Edited 4 times in total |
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12th May 2024 5:03pm |
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Old-un Member Since: 12 Feb 2022 Location: Manchester Posts: 143 |
Sorry, I thought it was the opposite like driving at 20 mph made the filter become more blocked rather than burning more off ? RR owner |
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12th May 2024 5:41pm |
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Range Rover L322 Member Since: 03 Sep 2019 Location: South West Posts: 329 |
No probs. Best things to monitor are Demanded regens and Exhaust Gas Temp (EGT) (Bank 1 - Sensor 2). You'll know you are regenning when that EGT sensor is between 600º-650º. .... however ... it is a lot easier to just wait for the car to tell you when it needs a run... . 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) |
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12th May 2024 8:56pm |
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uplandvilla Member Since: 07 Mar 2024 Location: East Sussex Posts: 13 |
Thank you very much gentleman.
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18th May 2024 9:34am |
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SpitfireS Member Since: 10 Jun 2019 Location: Mainz Posts: 106 |
How about testing the differential pressure sensor itself?
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18th May 2024 10:38am |
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Range Rover L322 Member Since: 03 Sep 2019 Location: South West Posts: 329 |
Firstly don't worry, this is not as bad as it seems.
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20th May 2024 12:05am |
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JayGee Member Since: 27 Jul 2021 Location: London Posts: 3243 |
Replace the MAP sensor or check the wiring as the fault is code clearly describing an electrical fault and not a blocked sensor. Without a working MAP sensor the fueling will be wrong and likley causing exessive soot buildup. 2012 TDV8 Vogue (L322) |
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20th May 2024 6:51am |
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uplandvilla Member Since: 07 Mar 2024 Location: East Sussex Posts: 13 |
Thank you all for your helpful suggestions.
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20th May 2024 9:37am |
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JayGee Member Since: 27 Jul 2021 Location: London Posts: 3243 |
The regen process shouldn't take that long - ask the garage what the soot level reading was after it had stopped?
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20th May 2024 10:01am |
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RRLG16 Member Since: 21 May 2024 Location: England Posts: 3 |
I’ve had my 2016 reg sport for 3 months. It had a new engine under 2 years ago from the JLR dealership so I thought it was a good car to buy. Ha. The exhaust filter light has come on several times right after long journeys. After getting home from a 400 mile trip to the Lake District for example. The light would come on & then disappear after a few minutes. The other day it came on & immediately went to red visit dealer. I’ve taken the car to my local garage & they said they were unable to clear it. They called last night & said the part alone is £1600. This garage is not an independent Land Rover garage. I’ve read this very helpful thread (I don’t have a clue about cars) & I’m now wondering whether I should take it for a second opinion at the Indy garage. Annoyingly I did have it booked in at the Indy next Tuesday as I also have the airbag warning light coming on intermittently. I took it to the other garage as I could get it in on the same day. £1600 feels a little sickening. |
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21st May 2024 5:55am |
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uplandvilla Member Since: 07 Mar 2024 Location: East Sussex Posts: 13 |
RRLG16 - sorry to hear about your experience. Like you, I nearly bought a RR with a new engine (and new turbos) that had been fitted in the past year, thinking that made it a good car to buy. I actually "won" it on auction and only took the plunge because it ended up selling for a very good price, what I considered a "good deal" on a car with a new engine. It's a bit of a long story but luckily, the car went into limp mode with an EML light the day before I was going to collect it which allowed me to arrange an inspection with my indy LR garage. They came back and basically said "Don't buy this vehicle." It had all sorts of problems, including a ticking sound with the newly installed engine. And would have required MAJOR MAJOR work done to it. So fortunately I was able to dodge that bullet. My LR specialist also later told me that in the industry it's quite well known "to stay away from cars that have had a new engine." I was a bit puzzled when he first told me that, but then came to understand that requiring a new engine could potentially be symptomatic of it having been poorly maintained. It doesn't mean your vehicle has been. And I feel for you because I know that sickening feeling. However I wouldn't despair. If all yours needs is £1600 worth of work doing to it, I'd personally consider yourself not too bad off. In buying a used car I've always considered that they will require a fair amount of work. Obviously, you hope that they won't need that work in the first few months. But the reality is, someone is selling it for a reason. And it's important to go into a purchase with your eyes wide open. The point I'd like to make however is that I would HIGHLY recommend you wait and take it to your LR Indy. These are highly specialised vehicles and I've made the mistake in the past of having them serviced at non LR specialist garages. The fact is most garages don't know what they're looking at nor do they have the necessary tools to repair them. It's cost me well over £1600 in mistakenly trusting a non LR garage on my old RR. Waiting a week may be an inconvenience for you but it could also end up saving you a whole lot of money and misery. So long as your LR indy is a good one. Whereabouts are you located? You say you don't know much about cars but if you've found your way to the forums that's a good start. Maybe you should consider buying an OBD reader and downloading Car Scanner Pro. You can get a "Vgate iCar Pro Bluetooth 4.0 (BLE)" on Amazon for about £22. And the free version of Car Scanner Pro should let you at least read your engine fault codes. Just read them, don't clear them for now. And post your results. This community is an invaluable resource and you may just find that it's a simple fix. Happy to chat more if you like. And I wish you all the best. Best of luck. Current: 2011 4.4 TDV8 Vogue SE Previous: 2004 4.4 V8 Vogue |
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21st May 2024 9:24pm |
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uplandvilla Member Since: 07 Mar 2024 Location: East Sussex Posts: 13 |
Thanks JayGee. That makes a lot of sense about the EGR valve. And if the DPF were blocked with ash presumably I wouldn't see soot levels as low as 1.57g after a regen? Current: 2011 4.4 TDV8 Vogue SE Previous: 2004 4.4 V8 Vogue |
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21st May 2024 10:16pm |
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uplandvilla Member Since: 07 Mar 2024 Location: East Sussex Posts: 13 |
UPDATE today from my LR indy and happy to report I now have the car back!
The full work report is below: And photo of the MAP sensor.
I asked what level they were able to get the soot reading down to and they said about 13g. They instructed me to go for a long drive and NOT to plug in my OBD scanner, as they said sometimes the scanners can block the regen from happening. I've not seen that in my experience, but didn't want to risk it. So I went out and did roughly 75 miles in total with 40-50 of those at roughly 50mph, primarily up and down a particular stretch of dual carriageway. Despite my dire curiosity to monitor what would happen, I left the OBD scanner unplugged as instructed, so unfortunately can’t say exactly what happened. After that bit of drive my fuel level was at about 38% so I decided to stop for petrol. At which point I plugged in the device to see if it had worked. The soot level reading was at 19.22g. Which in my mind means it hadn't done what they were hoping it would do? It clearly climbed from 13g. But whether or not it dropped first is impossible to know. I had been a bit concerned when we set off as it was rush hour and hit a bit of traffic before I could really get going. Again, impossible to say if that impacted things as I wasn’t able to monitor. Then, knowing at 19.22 it would soon trigger another regen, I decided to take off again along the same route. This time I monitored it. And sure enough at 19.61g the regen kicked in and it started dropping quite quickly. It went down all the way to 5.1 before it started to climb again. All in all, I believe it took about 25 miles for it to regen to that level. My indy also said that getting down to 6g is all it needs. So I considered that a success. So at that point I decided I could safely drive home. The real question however was if it would start to quickly rise again. Because I know it's able to regen ok. My issue was that it kept rising too quickly thereafter. By the time I got home, which was an additional 20 miles or so, it had risen to 8.24g. Which is where it is now. I can't say I've ever returned home with a level so low. So that's reassuring. And only time will tell now if that has completely resolved the issue. Fingers crossed! I guess I need to now look back through the posts to better understand how quickly soot levels are expected to rise. But previously, I was getting into the 20-23 danger zone every 2-3 days and would have to bolt out and spend an hour or more driving... just to calm my nerves. In any case, I reported this back to my indy and he said:
Hopefully now I can do exactly what he and some of you have been saying, which is to just relax and drive! Thanks again Current: 2011 4.4 TDV8 Vogue SE Previous: 2004 4.4 V8 Vogue Last edited by uplandvilla on 22nd May 2024 7:03pm. Edited 1 time in total |
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21st May 2024 10:19pm |
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