EGR Deleted but... Some new fault codes P04CE and P04D0 Temperature Sensor

So, I have had the EGR assembly removed completely, blanked off and a coolant bypass pipe fitted due to a coolant leak suspected from the EGR cooler.

However, despite the tuners efforts I'm assuming a temperature sensor is still being read and needs to be "disabled" perhaps.

Would any of you please be able to give myself or him a steer into what he may have missed as despite the coolant leak being fixed and the van running well it's throwing the engine light back on every so often.

Cheers,

Steve
 
EGR delete is no easy job as the Engine map needs changing for it to work.

The EGR valve works with the turbo, dpf, adblue and throttle body plus loads of sensor readings to set the Emissions as per the engine map.

So all the above will lay with the tuner with regards to the engine light you have.

You can't just disable a temp sensor as such.


.....

Personally I'd put the EGR system back on an restore the default engine map.

.....

But there are aftermarket tuners that deal with EGR and dpf delete for track cars and vans.... It might get be worth having a chat with them?
 
Oh man, that definitely doesn't fill me with confidence :-D I did say, if it's too big a job, just lob another EGR in for the sake of £400 or so... Well, you live you learn I guess. At low revs it's definitely not right, wants to stall but after that all seems well. Possibly a remap on an actual rolling road may help. Who knows. Thanks again for your assistance.
 
Oh man, that definitely doesn't fill me with confidence :-D I did say, if it's too big a job, just lob another EGR in for the sake of £400 or so... Well, you live you learn I guess. At low revs it's definitely not right, wants to stall but after that all seems well. Possibly a remap on an actual rolling road may help. Who knows. Thanks again for your assistance.
Did you manage to sort this out?

I've just had my EGR removed and had the same issue. Temperature sensor comes up with a fault and the van also wants to stall at low revs when driving through traffic.
 
Did you manage to sort this out?

I've just had my EGR removed and had the same issue. Temperature sensor comes up with a fault and the van also wants to stall at low revs when driving through traffic.
did you have a new engine map to account for the EGR delete?
 
Oh bugger :-( still driving it is as it is at the moment but need to get myself to a rolling road for a proper remap and/or egr removal "specialist" unfortunately so if you have any updates please let me know.
 
Ahh sorry to hear! Will let you know if I do.

My mechanic says his tuner should be able to sort it out when I take it in for a service after running in the engine. (Had to replace the pistons and rebore the cylinders due to the bloody egr ).

If he can't find the solution I'll take it to APR in Malaga and hope they can find a tune to sort it out .

I think the remap they've installed for the egr delete is affecting the DSG tune. But hooking it up to the computer shows no faults other than the temperature sensor.
 
Please bear with me on this, I know it looks a bit long-winded, but I think it’s worth having a bit of background detail….

My van is the EU6 102 engine with adblue.

Sometime in June the dreaded flashing coil light made an appearance one afternoon when I’d just started the van and I was leaving work! During that journey to drop something off the van was running on limited power. When I restarted the van, the fault had disappeared and all was back to normal for my journey home…. and to be fair, I’ve had no faults since, but after reading the endless nightmare stories on this forum + previous personal experience with a blocked/failed EGR valve, this got me worried that it might be EGR problems?

I contacted @Dav-Tec (Chris) who by now had done a number of very successful jobs/upgrade’s on my van to see if he could work his magic with a possible EGR delete? Unbeknown to me, @Texxaco (Pete) had been having similar issues with his stunner of a T6 and had already had the @Dav-Tec treatment in the way of a EGR and ADBLUE ‘solution’!

At the T6Forum summer camp meet in July, Chris kindly scanned my van and found that the fault was actually with the adblue system and not the devil’s work EGR as I’d suspected…. either way, I wanted the EGR sorting! So I got booked in with Chris to have a custom remap which would include the same EGR and adblue ‘solution’ as Pete’s van.

On the day of the remap, Chris did a scan as he always does prior to any work…. goes through any fault codes with me and when looking back at previous scan’s, Chris discovered that this adblue fault had history and was showing up on most of the previous scan’s. I told Chris as well that I’d very recently noticed the smell of diesel fumes on startup…. not necessarily in the cab, just in general around the van and when we went out on the first data logging run it was clear that something wasn’t quite right?

When we got back to Dav-Tec HQ, Chris found that the rear EGR pipe was split and exhaust gases were p#ssing out into the engine bay and this was causing the boost pressure problem. No problem for Chris, he removed the split pipe, fabricated a couple of ‘delete’ plates from some sheet steel, refitted the lot and we went out on another data logging run. Much better (near perfect) results meant that a new custom map could be written to include the EGR ‘solution’ and away I went.

I’ve been driving around with the new map now for a week…. to and from work and the usual runs and roads so that I could get a comparison with what I had before (which by the way was a generic Pendle map installed by Leighton Vans). Don’t get me wrong, I had no complaints or issues with the previous map…. I’d had it on there for over two years, but because of the running issues, I needed a ‘solution’ and Chris’s custom remap ticked all my boxes.

I couldn’t be happier with the results of the custom map supplied by Chris…. the engine runs free and smooth even from a cold start up and pulls progressively, purposely and smoothly throughout.

I want to thank Chris for going above and beyond as he always does…. and also his very patient wife Tracy for putting up with me on that Saturday!

Cheers, Matt :thumbsup:
I’d definitely recommend getting in touch with Chris @Dav-Tec
 
We can sort this no problem! We do tons of vans with EGR and AdBlue solutions. We have stacks of members on here that can rate our work such as @T6ARF (thanks btw for the recommendation) @Texxaco @Bigsidavies and many more.

I'm concerned your "tuner" doesn't know how to sort this.

As for rolling road this, that and the other. We never use a rolling road as it gives you "lab" results and not real world. It doesn't show how it drives which is the important things. We collate data via data logging to check things like boost, fuelling, air to name a few from there our file writer can use the data to create a map for the vehicle and then we take the vehicle out again, run another log and repeat until it's performing how it should.

We've had and continue to have great success with our maps and never had one defeat us yet!

Feel free to get in touch.

Cheers
Chris
 
We can sort this no problem! We do tons of vans with EGR and AdBlue solutions. We have stacks of members on here that can rate our work such as @T6ARF (thanks btw for the recommendation) @Texxaco @Bigsidavies and many more.

I'm concerned your "tuner" doesn't know how to sort this.

As for rolling road this, that and the other. We never use a rolling road as it gives you "lab" results and not real world. It doesn't show how it drives which is the important things. We collate data via data logging to check things like boost, fuelling, air to name a few from there our file writer can use the data to create a map for the vehicle and then we take the vehicle out again, run another log and repeat until it's performing how it should.

We've had and continue to have great success with our maps and never had one defeat us yet!

Feel free to get in touch.

Cheers
Chris
Would love to be able to go over to sort it out, however I live in Gibraltar. So yeah slightly far away .
 
We can sort this no problem! We do tons of vans with EGR and AdBlue solutions. We have stacks of members on here that can rate our work such as @T6ARF (thanks btw for the recommendation) @Texxaco @Bigsidavies and many more.

I'm concerned your "tuner" doesn't know how to sort this.

As for rolling road this, that and the other. We never use a rolling road as it gives you "lab" results and not real world. It doesn't show how it drives which is the important things. We collate data via data logging to check things like boost, fuelling, air to name a few from there our file writer can use the data to create a map for the vehicle and then we take the vehicle out again, run another log and repeat until it's performing how it should.

We've had and continue to have great success with our maps and never had one defeat us yet!

Feel free to get in touch.

Cheers
Chris
I'm in Ireland. May need your expertise. Egr problems and difficulties on 2018 204 caravelle. Would you remove dpf with egr delete?
 
Quick update, tuning guy who did the EGR delete has now managed to "remove" 2 faults. One or both of which were causing the engine light to be illuminated. However, still runs like shit at low revs when cold. I imagine after removal of DPF and EGR it is likely to need a tune so will try and sort that as a next step and let you know how I get on.
 
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