DPf fails sounds as though the sensor or more likely the pipes to it are the issue.
Pipes can clog or crack, either gives an imbalance at the sensor so the poor wee beasty thinks the DPF is clogged.
I may be wrong but would be looking to check.

Repeated DPF fails and engine warnings will come on, not directly due to oil dilution but because there is a risk of it.
Higher/increasing oil levels are the result so how your oil is dropping, dunno?

Leaks are the obvious but you seem to have looked for oil on the ground so perhaps put that one to bed.
I'd be looking in the intercooler or intake pipes from Turbo..... won't necessarily see a load of smoke behind but seals giving way?
Worth checking, if it is that the next stage is a turbo runaway and that you do not want.
If it is diesel dilution, it is skinnier then oil so may be aiding leakage?

May be worth getting a sample of oil and getting it checked... google oil analysis.... but heavy diesel dilution should be able to smell

 

I asked why the oil was low when dilution should cause it to increase?

You MAY and probably DO HAVE and oil dilution problem and the DPF's job is to effectively hide the fact you are burning oil. If you do in fact have an oil dilution problem, then oil WILL get burned at a huge abnormal rate depending on severity. Oil level will only increase if the "thinned" oil is not consumed

You really need a Renault speaking scanner to access all the injection computer live parameters .................

When you have access to those, you can monitor DFP differential pressure, soot content, DPF temperatures, etc ........... all things to do with the logic of triggering a regen.

Then - when an auto regen gets triggered you can monitor the states of the regen and DPF - take decisions from there.

If according to the injection computer it suspects you have oil dilution present, it WILL fail to trigger an auto regen ................. and if you then force a manual regen you end up with even worse oil condition - sure you MAY get a manual regen to complete and therefore allow you to effectively use the engine as normal (as you experience) until the auto regen regime will again dictate the non-completion of the auto regens and you are back to square one.

I would suggest:

Clean/fresh oil (AND ENSURE YOU RESET THE OIL WEAR COUNTER) - do a manual regen and monitor the DPF's life from there

 

Thanks for the replies so far. He's checked the pipes to the turbo for oil and all clear. He's now cleaned a pipe/sensor in the actual engine I believe? It's running ok at the minute. We topped up the oil and will monitor that every day. What I'd like to know is the following. It never struggles until the lights come on the dash. Is the light causing the spluttering/struggling of engine at 2.5k revs or is it that that causes the lights to appear? He hasn't changed the oil this time as he only just did that a week or 2 back. So by cleaning this pipe in the engine and topping up the oil the spluttering of the engine at 2.5k has stopped. Obviously he reset the fault codes. Would it be the code resetting that's stopped the problem or the very fact it's now running ok after cleaning the pipe is a positive sign? Or has it just not attempted a re gen since the codes were cleared? So many questions sorry lads.

 

He's now cleaned a pipe/sensor in the actual engine I believe?

"actual engine"?.......................

Which exact "pipe/sensor"?................

Is the light causing the spluttering/struggling of engine at 2.5k revs or is it that that causes the lights to appear?

Neither - the injection computer senses that its unable to perform an auto DPF regen .................. safety says limit temperature on a possibly blocked DPF (it doesnt know but logic from the designers correctly limit the exhaust flow by killing engine power) so it sets a light end you struggle.......

He hasn't changed the oil this time as he only just did that a week or 2 back.

Your vehicle your choice how long you want to faff around with unknowns irrespective of what the supposed mechanic says he did

So by cleaning this pipe in the engine and topping up the oil the spluttering of the engine at 2.5k has stopped. Obviously he reset the fault codes. Would it be the code resetting that's stopped the problem or the very fact it's now running ok after cleaning the pipe is a positive sign?

Cleaning the pipe IMO

Or has it just not attempted a re gen since the codes were cleared?

Who knows - you can guess and may be right but a proper mechanic with a proper scanner that also understands what is going on and what he is doing would easily justify the happenings

 

Sorry my lack of knowledge in this matter is clear! He's cleaned a pipe/sensor under the bonnet is all I know. I'm waiting for him to tell me exactly what it was and I'll post.

 

Apparently he cleaned/checked the pipe from the pressure sensor under the bonnet and cleaned it.

 

Back again. Van worked ok for a couple of weeks but yesterday the Stop light came on and Engine Failure Hazard. I just don’t know what to do. I’ve got one guy telling me to cut out the dpf and have it remapped and another saying I’ve probably got a knackered engine that’s got loose seals and that’s why I’m burning oil. Only option now is back to Renault unless anyone knows a good garage in the Stamford/South Lincs area ?

 

I’ve got one guy telling me to cut out the dpf and have it remapped and another saying I’ve probably got a knackered engine that’s got loose seals and that’s why I’m burning oil.

Which illustrates the dangers of guessing instead of finding the problem and fixing it.
You got one guy telling you to feck up your van by ensuring it won't pass its next MOT and another telling you to spend thousands of your hard earned on swapping an engine for what may be something far less drastic.

The beasty is 4 years old, how many miles on it?

 

So my prediction in post #3 above has come to fruition then?

 

I’ve only avoided going back to my Renault dealer because they’ve come up with different ideas every time and seemed too keen to get me to book in. After a service there I wasn’t overly happy with them. I’ve now found another Renault dealership a little further away who just sound more professional on the phone who I’m booked in for a diagnostic with. Hopefully they’ll get to the bottom of it.

 

More info just received from the dealership. It's been in with them since the 9th March. They've apparently forced a regen and investigated the oil usage. No contact at all unless i chase them. Just been told that it needs anew Turbo. I asked why and how had they come to that conclusion only to be told he didn't have the paperwork in front of him. All I want them to do is explain to me why this has happened if they can and confirm that by replacing the turbo they’ll cure the dpf issue as well. I’m in contact with Renaul customer service and they have intimated they may make a goodwill contribution towards the repairs as I first had issues in warranty. I’m going into the dealership today as I’m after a full explanation including diagnostic results as to how they’ve come to this conclusion. I asked on the phone how the turbo using oil would affect the dpf as I’m presuming that’s what’s happening. The bloke couldn’t tell me why so I’ve asked to speak to the technician instead. That’s 2 different dealerships now who’ve come up with various explanations as to why I have the problems I do. Would a faulty turbo not flag up on the other diagnostic tests I’ve had carried out or are the Renault tests much more detailed as I presume?
Thanks all for your help and advice so far.

 

Faulty turbo leaking oil into the intake system could be overloading the DPF, which may not be regenerating fully which in turn can be causing the oil distillation.
As well as accounting for the oil loss.

See if their explanation says similar.

 

Thanks mate much appreciated I’m on my way over there now. Will post an update. If they replace the turbo should they replace pipes or connected parts to it it will they leave those if clean etc? I know it’s a bit complicated to know without seeing it but the thing I find with the dealership is they give the info to the reception and they have no mechanical knowledge and don’t explain it properly.

 

I would hope they replace feed and return oil pipes, just to be safe.
And flush intercooler and clean intake pipes

 

So I chased them today. Asked for the diagnostic report and and explanation of what they’ve found. I’ll attach it to this message. Very very poorly written and again no real confidence in them I’m afraid.


Good afternoon,

As discussed on the phone the technicians report so far is…

Checked for engine management light on, found particle filter & oil dilution faults, checked DPF regen & oil change & results all ok. Checked for using oil regularly. Found oil present In intake & intercooler, suspected turbo fault. Require turbo & intercooler.

I hope this helps and I apologise for the delay.

could they not just flush the inter cooler as you say?
Cheers

 

That confirms my thinking.

Intercooler... I would flush it, possibly fill it up with solvent/detergent and leave overnight then drain, brake cleaner..flush again.... but that is to avoid cost of intercooler and my time being free.
I would assume they would also have things like paraffin bosh available to them which would make it simpler and quicker.
But would still be a couple of hours and no gurantee that they would get all the oil out...

It's a balance with garages between cost, labour and comeback.... the latter being much of the reason they replace rather then fix nowadays

 

Thanks for replying so soon. Yes I suppose by the time they put the labour charge on for flushing the intercooler it's just as cheap to change it? I'll try and nail them down. They won't say that the turbo oil problem is the cause of the dpf problems and the oil dilution. I just expected a full diagnostic report showing levels percentages or whatever it shows. Didn't expect a few lines. I'm waiting to see what they want to charge me to do the work. I'm dreading it I bet it'll be about 2 or 3 grand.

 

Popped in again today as they hadn't bothered to email me the break down of what's been done so far. Said to replace the Turbo and Intercooler is £2750 + VAT. Then couldn't tell me what that included. Plus already it's £400 for the diagnostic and oil change. If I don't get any help off of Renault I may as well sell the van and look for another. It's done 106k. Even if I got 200k out of it (unlikely) by time I have cleared the finance owing and the bill it's 8k spent before any other issues. I'm going to pursue it as best I can but everything is ridiculously expensive at the moment as we all know.

 

Ignore that above! Just rung me and hadn't priced in for replacing the intercooler! I'm getting more and more frustrated with them. Does anybody have a rough estimate of what it should cost to replace Turbo,Feed/Return pipes/gasket/intercooler. That's what he's just told me needs doing. Said it's 10 hours labour to change the turbo on it's own. Any help would be appreciated chaps as I'm not going to be had over. I may as well sell the thing and put the money towards a new one at this rate.

 

Hello mate did you get a resolution!

 

Hi Dave just read your post. I'm having trouble with my Renault Trafic 21 plate using oil. Can I sak which dealer kept fobbing you off?

 

You need to found reason of your dpf blockage first step for that is software update that cars have many software updates and then go further with this regenerations you just damage dpf when you found right reason car will do automatic regeneration while you drivin check with your garage for software update?

 

Hi Dave I have a 2019 Trafic with the same high oil consumption. No other issues runs great no oil leaks no smoke this is the second one I have had the same problem with dealer fitted a turbo on the first one under warranty which didn’t help so refunded me and stupidly I bought another with 66000 miles thinking I was just unlucky with the first one. Any help would be appreciated.

 

Hi all quick update
I was advised to replace the PCV breather in the rocker cover which I have done and has made no difference to the oil consumption. Just incase anyone else was thinking about trying this.

 

Surely this must be a common fault on the Renault engines mine is exactly same as being described 2019 traffic business +

 

I've had exactly the same fault it's very common on this van along with the vivaro and primstar. Get the DPF either replaced which isn't cheap or go down the route of having it cut open cleaned, welded back together and then deleted. It's a an issue with this van and Renault will not want to admit that.

 

Hi all, just came across this post. Seem to be having the same issue with my 1.6 130bhp Megane GT Line Tourer - serviced 3,000kms ago, check oil light came on and checked the oil.. basically empty. Topped up again until mechanic can see it next week. I've also got the dreaded check anti pollution system message on the dash as well.
Car has been faultless in driving, only issue was a repeated failure of a tire pressure sensor which sorted itself out - has anyone had any luck getting this fixed on a Megane?

 

I had the same issue new turbo, dpf pressure pipe, egr valve and now waiting to see if the DPF blocks up again and monitoring the oil Spent £3.500 so far

 

Ant updates on this? Mine has eaten the turbo at 30000 miles

 

I'm also very interested to know if your problems were solved with the fixes. Cheers

 

Hi OK I have this,I have been told that one of the egr valves (I haven't checked If it has two ) however the same applies if it has one is forcing the oil out of the sump back through the turbo and contaminating the dpf. This isn't due to a faulty egr but more to do with the fact its open too long.
So it's a known issue and there is a software update although not everyone will admit it .
Hope this helps. Mine is sat here with a blown turbo at 30000 miles .

 

Did you get this information from a Renault dealer? I’ve got a Trafic with all the symptoms above, high oil usage etc just spoke to my local Renault dealer and they are denying there’s any software update

 

Would be interesting to hear if anyone's got any updates on these issues? I've got a 2018 R9M single turbo engine and I think it's burning oil, blocking up the DPF, causing too many regens and diluting the oil too quickly. Very interesting to hear Stwve172 info on the EGR system a couple of posts above. I wonder what year engines that may apply to?

 

Just sent my 1.6 traffic in as had it 2 months (19 plate 67k miles) serviced on initial buying, had to fill with oil 1 month later as empty, lasted another month empty again.
They’ve performed a software update to the injection computer and im to monitor it…..