Mine takes considerably longer to get up to temperature with EGR mapped-out than before even in the middle of summer here, so in cold climates you might be waiting a long time.

Mine hasn't changed in time to get up to temp and it was -7c here on Tuesday morning... Cam

2011 TDV8 Vogue in Stornoway Grey

Old thread ressurection time ,
Those of you that have been running with an egr delete for some time now have they caused any issues ?

Yes it has; a much cleaner intake and improved mpg and response  Cam

2011 TDV8 Vogue in Stornoway Grey

very pleased that I got my EGR programmed out, this was done when it was re-mapped using a mobile technician that I have used before, he trusts Alientech equipment to do this on JLR vehicles and many others

On my TDV8 4.4 he had to remove the ECU ( lifted it out of the battery compartment area ) , easily done and 45 mins later it was taken on test drive and did seem to have a bit more - but hard to quantify to be honest

its now nearly coming up for 5 years, and am still pretty pleased that I got it done, by the way, you don't need to cut out your DPF ( you should not do it anyway re new MOT rules ) BECAUSE the EGR being programmed out ( soft delete ) is all you need

https://www.youtube.com/shorts/PuRoVucFjp4

NB you may want to use Launch UK every 10,000 miles to help clean the DPF from time to time

https://www.launchtech.co.uk/technical-flu...MQBfV1XMhw

Last edited by pcourtney on 29th May 2025 11:19am. Edited 1 time in total

If the EGR is removed from the equation will the DPF still be functional or useful?
I tried doing things the right way and the EGR temp sensor nut snapped off, so has left me in the situation of an engine out repair or disable the EGR and remove DPF?

my car has been exceptional - so yes of course it will be OK with EGR programmed out, and leave the DPF in situ please - no need to take the engine out, you don't need the EGR sensor or anything EGR related once it is programmed out !

Yes it will cost you £200 or so to find someone who can program out the EGR from your ECU, but that it a much bettter place to be than pulling an engine !

That was my train of thought.. Disabling the EGR in other previous vehicles has led to only positve effects on the driving and maintenance experience. Not had a DPF fitted to any of my vehicles until now and it clogged up last week and went into limp mode because the EGR temp sensor was faulty. As previously stated I tried to replace it, but was not succesfull as it was truly stuck in the manifold.
I do not feel removing the engine is a sensible option.
Will the DPF not clog up if the EGR is not functioning? it was my understanding that the EGR valve was an integral part of DPF regeneration.

your understanding is wrong - the EGR comes after the DPF - it is a closed system - it only comes on when you drive slowly, at higher speeds the EGR is closed because the engine is restricted when EGR is in operation ( EGR was an afterthought to reduce emissions cheaply, but without regard to anything else)

https://www.youtube.com/shorts/PuRoVucFjp4

Last edited by pcourtney on 29th May 2025 11:21am. Edited 1 time in total

Mine is booked in early next week for EGR deletion and a gentle remap.

I´ll report back on the results. 2012 4.4 TDV8 Westminster - Baltic Blue, Jet interior
1997 P38 2.5 DSE auto & 1998 P38 2.5 DT Manual
1988 Vogue 3.5 EFI - Manual, gone.
2004 Volvo C70 2.0T convertible, had since new.
2007 Mazda MX-5 2.0 Sport Roadster/Coupé, had since new.
2024 Mini Cooper S cabrio, JCW kit, 2.0, DCT auto

pcourtney wrote:

very pleased that I got my EGR programmed out, this was done when it was re-mapped using a mobile technician that I have used before, he trusts Alientech equipment to do this on JLR vehicles and many others

On my TDV8 4.4 he had to remove the ECU ( lifted it out of the battery compartment area ) , easily done and 45 mins later it was taken on test drive and did seem to have a bit more - but hard to quantify to be honest

its now nearly coming up for 5 years, and am still pretty pleased that I got it done, by the way, you don't need to cut out your DPF ( you should not do it anyway re new MOT rules ) BECAUSE the EGR being programmed out ( soft delete ) is all you need

NB you may want to use Launch UK every 10,000 miles to help clean the DPF from time to time

https://www.launchtech.co.uk/technical-flu...MQBfV1XMhw

No I did not need to use the gun, just poured in the Launch UK bottle with a full tank of diesel, say every 5000 miles, been doing it for over 5 years and all good - easy life

https://www.launchtech.co.uk/technical-flu...f-cleaner/

I've read this thread all the way through and I'm considering getting a remap and EGR delete on my 2012 4.4 TDV8, but had a couple of questions.

I seem to get DPF regens about every 60-100 miles, which appears more frequent that others report. I have the P040D-00 Exhaust gas recirculation temperature sensor high (2B) that won't clear, which I understand is very common. My indy said it might not be worth replacing as there is risk of breaking off the sensor and ending up in a worse position. In this case would an EGR delete be a potential fix?

I have observed that the EGR valve position is at 16% actual and 11% commanded from a cold start. I've also found that when it's commanded 0% under acceleration it's about 5% actual. Would this mean that I would need to blank the valve after the delete because it may still be open slightly? If not, could I potentially clean it and see if I can get it to 0% easily myself? I don't have any mechanical experience myself, but if it's something that I can do myself or with a hand I'm always up for trying.

I do find the throttle response to be a little delayed in general, and if the remap helps with that I'd definitely enjoy it. Not sure if it's relevant or not, but I do find the throttle response is much better after the car has been driven for a time though. To the point that I'm often not expecting to move as quickly as I do.

I had the same sensor fault.. I tried to replace it myself but it felt too jammed in and I didn’t want to risk snapping it. Sent it to local garage and they snapped it off unintentionally. Fortunately the threaded part remained in, blocking the hole. My options were engine removal and replacement of sensor or remap and EGR blanking plate. After removing the intake “doughnut” and witnessing the amount of that had collected in there because of Egr. It was an easy decision. I left the dpf functional, cleaned out the intake side of things as best as one can without removing injectors etc and had the vehicle remapped mildly and Egr mapped out, I also blanked it off for good measure. You can actually hear the engine breathing better now. It’s shocking the restriction that Egr can cause by clogging up the intake side of things with soot and gunge

I had the EGR deleted and a mild remap done about a month ago, and I'm pleased to report it was well worth it.

Unsurprisingly, the P040D-00 code is now gone, and the DPF is functioning normally. The MAP sensor has stayed clean since the deletion as well.

The engine runs quieter and feels noticeably smoother across all gears. The mid-range punch is impressive, and acceleration is now much more linear, with no real dead spots and significantly improved hesitation.

@steve2347 – I’m not sure to what extent the EGR has been left open or closed, but that’s a good question.

Can anyone recommend a blanking plate that fits the 4.4’s EGR? 2012 4.4 TDV8 Westminster - Baltic Blue, Jet interior
1997 P38 2.5 DSE auto & 1998 P38 2.5 DT Manual
1988 Vogue 3.5 EFI - Manual, gone.
2004 Volvo C70 2.0T convertible, had since new.
2007 Mazda MX-5 2.0 Sport Roadster/Coupé, had since new.
2024 Mini Cooper S cabrio, JCW kit, 2.0, DCT auto