Hi guys, it is a LR specialist but not a MD. I wouldn’t trust myself to do the manifold myself - I might look at a plastic weld as the split is very small.

Gregg I might look at your machine. I only need to get it down to do a regen. I understand what the technician was saying. As the dpf fills up the voltage increases and so does a regen. The voltage stayed at 0.83v on my sensor so this was inhibiting a regen. It should have increased in order to initiate a regen as I understand it.

The dpf clean did sound expensive.

Quote:

The voltage stayed at 0.83v on my sensor so this was inhibiting a regen. It should have increased in order to initiate a regen as I understand it.

Ah ok that's making sense now.

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

Hi Greg,

Do you know for DEFINTE that your DA-Dongle DPFDR dongle will initiate a regen if the readings are over28.5 (mine is 29.2 now)

If so I will buy one. do you have to reset the DPF readings to zero first using IID? presumably this tricks the Main engine ECU into thinking it can regen?

I’d give them a ring DB.
They were helpful when I spoke to them.
You don’t necessarily need the IID

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

Previous Situation - DPF red Warning present/Restricted Power/DPF reading 29g of soot/LR dealer unable to force regen due to level being over 28.5g (the limit of their LR software capability)

Finally found a reliable DPF cleaning company and set off to visit them saturday having had the car sat for over a week after having had the rear DPF sensor replaced.

On starting up and having driven a mile I noticed the soot reading now only 27.7g (so under the 28.5 limit!). Called the LR dealer who said drop it off and we will force regen.

Current situation
LR dealer called me a day later saying although they had got the level down to 18g on the first try and then 4g on the second, the car wouldn't come out of restricted power nor extinguish the Red DPF warning.

LR dealer has no idea why not, don't know what to do next. I told them to try the old battery reset procedure
Still not heard from them.

Anyone any ideas? I am thinking maybe the Main engine ECU is FUBARed? That seems to be the only thing that could be hindering a reset?

If a LR dealer can't clear a EML then time to go.

Re the cause, fitting a new sensor requires quite a complicated calibration DB.
Your EML could be due to that. Have a look in the workshop manual.

Try your IID just for a chance too to scan for errors and also clearing them.

Remember on mine the process was to reset the soot by telling the ECU it's had a new DPF.
Anyone passing by and reading this should NOT DO THIS without advice and or a specialist.

I personally think the right DPF place will be able to sort it.

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

Right, just had my car back from the LR dealer having had a red dpf light come on and not able to clear - had rear sensor replaced. They couldn’t force regen the dpf (they got lower soot readings but the engine Ecu failed to recognise the lower reading and it remained in restricted power with red light on.)

LR dealer suggested getting the dpf cleaned to get a soot reading lower than 28.5 so they could force regen (£95 a pop + vat)

Took it to a terraclean franchise (performance engineering company) who did it for £180 + vat. They also cleared all the red lights and had the soot level down to 1.9g of soot. it has run fine since and soot levels rose to 5.99 over the next 20-30 miles but had a motorway run for 50 miles the other day and plugged the IID in for the trip. The car started doing its own regens along the way at around 350 degrees so it’s back to normal operation again (was failing to initiate Normal regens before)

Click image to enlarge

Click image to enlarge

That's awesome Dolphinboy. I recommend you add "number of demanded regens" to your IIDTool and maybe "total distance" too then you can see exactly when it asks for a regen as well as easily see the mileage vs the soot.

Click image to enlarge

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Last edited by Range Rover L322 on 8th Feb 2020 4:49pm. Edited 1 time in total

Roger will do

Morning All

I'm having DPF regen issues on my 4.4 tdv8. Car has covered 121k miles and I've had for nearly 2 years. I've had dpf regen issues for the past year. I've had the car in to a DPF specialist just before lockdown. It was removed and cleaned completely of all soot and ash. He also dropped the oil and filled with low ash oil (I had a service a few months earlier so this was a precaution in case the wrong oil had been used).

Within 2 months the light was back on (amber) and having tried forced regens (engine up to temp / plenty of fuel in the tank / steady motorway driving etc) it has moved to the red dpf full.

Took car back to DPF specialist, referred to an engine specilaist who found several leaks on the cooling system. Inlet manfiold came off, gaskets on the vee replaced, various hoses and thermostat housing replaced etc and put back together.

Car back to DPF specialist who says he has taken the DPF back off and cleared it (for which he didn't charge) however not long after driving away the yellow dpf full light is back on. My Icarsoft IID tool reports the soot level as 28g as of now (was around 23g when I had just had it back from the DPF specilaist).

Some key points accumulated through some of my own digging around (all of which has been done since the yellow light came on for the last time):

• I've cleaned the MAP Sensor (was all full of thick black crud)
• Intercooler pipe has been removed and MAF sensor cleaned. EGR butterfly was pretty clean and didn't appear restricted so should operate when called for.
• There was a light oil layer around the intercooler pipe coming from the EGR valve.
• Oil level has been fluctuating from "Normal" to "overfilled" (I've checked this numerous times over the past week and it has started to just show as "engine level ok".
• Battery state of charge is quite low. It was around 5% when I first checked it. I connected the charger for around 5 hours last night and it's moved up to 9.5%.
• I'm getting no fault codes other than "P2459 DPF Regeneration Frequeny".

I'm at a loss at the the moment. The car was in with the engine specialist for 6 weeks which is probably why the battery has dropped so low. But I'm worried about trying to force a regen and it moving to the red DPF full...

It worries me that the DPF specialist has washed his hands of this and basically fobbed me off. It's put me off taking it anywhere and getting more big bills with no resolution!

Sorry, there's a lot of information above and my current thoughts are:

1. Smoke test to check all hoses/inlet manifold is all in order
2. Get battery to higher state of charge (although would this play a part in the DPF not going into regeneration)?
3. In depth diagnosis focusing on sensors.

I don't think I'd have got anywhere near to understanding the system without this thread so hats off to all who have contributed!

Step 1 is check for splits in the 4 plenum hoses. Whip off engine cover and see if you have the original hoses on there. Take a picture and post it on here. More information: https://www.fullfatrr.com/forum/topic56424.html
Check all around and underneath for oily sooty deposits.
Thick silicone hoses are the way forwards.
Make sure the jubilee clips are tight. They can slacken.

Step 2: Check the intercooler to throttle chamber connection. The spring clip gets loose. I replaced the whole thing recently as it was a bit sooty underneath
https://www.fullfatrr.com/forum/post550968.html#550968

Step 3 If all the above are OK then definitely get a HIGH pressure smoke test. Must be high.

Most DPF issues are caused by air intake leaks.

After every oil change the service reminder needs resetting via diagnostic so ECU knows it’s new oil for soot in oil calculations

Got an IID? Get one. Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
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Last edited by DrRob on 9th Aug 2020 12:31pm. Edited 2 times in total

Thanks for the response - the inlet manifold was removed and reinstalled during the coolant system works. The hoses look like the original ones judging from the photos in the link. I'll have a look to make sure clips are tight and check for any soot beenath etc.

I had the intercooler throttle body pipe off yesterday, seemed ok (no visiual splits). Put back on and tightened clips etc (although I haven't tried clearing the DPF since doing this).

I have an Icarsoft LR v2 IID tool which is ok for checking and clearing codes.

The lack of fault codes is the bit that is throwing me... Has anyone else had codes thrown up for example, where they've had intake leaks on hoses/inlet manifold?

Cheers

Paul

This is addition - and after what Dr. Rob says

Can you find out if your DPF guy reset the DPF on the ECU ? It's possible he did not do this which is really needed after a clean.

What you can do is try the nuke option and tell the car it's had a new DPF fitted. If you have a IIDTool you can do this. HOWEVER, I do have to add a disclaimer for you, or anyone reading this - you do so at own risk.

What I can say is that I have done this but not using the IID, I used my DA-DPF tool. I believe if you go up a few pages on this thread I've explained it.

Again, you would do this once and after you have checked - and I mean really checked - the hoses + air system with a high pressure smoke test. A normal smoke test won't work.

Re hoses, you need to remove fully to even check as they can and often crack underside, or under the clips. Can't tell you how many posts have started with hoses are fine only for cracks to be eventually discovered hiding.

Lastly, you say "Icarsoft LR v2 IID tool" - you've described two different tools here and I can say IMO the Icarsoft LR v2 isn't the right kit for this job. The IIDTool from Gap diagnostics is very good. I have an IIDTool however I had to buy the DA-DPF tool too and sorted a similar issue. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Thanks Greg - sorry, I thought IID was a generic term for the diagnostic tool. I bought the Icarsoft to do the battery reset when I changed the battery last year. There is an option to tell the ECU it has had a new DPF filter. Might look at the IID tool as an option, might prove useful to have.

I'll ask the DPF cleaner if he reset the ecu after cleaning, if not, and after ruling out the hoses etc I will look at the nuke option.

I'll remove and check the 4 hoses on the inlet manifold in the mean time wilst I arrange for a high pressure smoke test.

Cheers

Paul