Hi AbiBuck and Welcome

What is happening to the oil level?
What car and engine have you got?
A possible explanation is that if the DPF keeps calling for regeneration you could end up with a lot of fuel in the sump.
Typically the sump level rises and maybe this is what triggers the oil dilution flag.
When DPFs were new some constructors sorted this with software changes.
I would be inclined to follow the sensor idea including the associated tubes.
Oh it's a 2.0 Trafic dci !
If I'm not mistaken, df070 is a crank sensor fault.

 

Hi Brendan!
A crank sensor fault! I haven't heard that before. I will have a look into that then. Thank you for the response, really appreciate it 😁
Abi

 

Me only .................

I will change the oil and see if its happier.

ITO ECU - the ECU refuses to do an (auto) dpf regen whenever there is any fault code present on the ECU - and in particular the oil dilution value. If you now go and force a regen you only screw the pooch by adding yet more fuel to the oil................. and if a forced regen is "successful" your oil dilution is still vey close to the ECU's perception of contaminated/diluted oil - next time you are on a trip and a auto regen gets triggered because its required, the ECU may start the process and then discover you have diluted oil - hence the recurring warning.

Read the whole of the thread this particular post is part of - lots of explanation there...............

Megane 3 1.5 dci fap **Sorted**

hello i have a 2010 megane 3 1.5 dci fap with just over100k miles. a few weeks ago the 'engine damage risk' warning came up, error code p242f. the local renault dealer did a full diagnostic, result fap blocked. they then performed a forced regeneration which sorted the error. Less than 50 kms...

www.renaultforums.co.uk

 

AFAIK, diluted oil happens when regeneration is not successfully completed.
During a regen, extra fuel is squirted in to increase exhaust temperature and aid in the regen.
If the system doesn't see changes that say regen is complete, after a number of failed cycles it throws a wobbly, assuming that the added fuel has ended up in the sump.
AFAIK (and may be wrong) the system doesn't actually measure anything to do with oil, just makes an assumption.
But as Brendan says, are your oil levels increasing?

By the sound of it, everyone has concentrated on the DPF but not the sensor..
There is only one but is connected to DPF before and after, it measures differential pressure.
Common issues with these are blocked or cracked connection pipes, failure of the sensor itself seems a lot less common then may be believed, a fault shows and people swap them, it is often only the pipes.

 

Just another thought, if the crank sensor is misbehaving, God only knows if, when or for what duration the extra fuel is being added.
Take out and clean off the crud would seem an easy step.

 

Thanks folks, I've brought up the possibility of a faulty crank sensor. They garage says they have looked into that but believe that it is not for my particular van rather older or newer ones? They quoted me £100 to have this changed but said it was highly unlikely this was the issue?

I'll have a look into the oil level.

Dancingdad: I'll see if they have looked into possible blocked pipes or cracks.

When I took it back to the garage the most recent time they did say that the machine said it did a successful regen within the last 300 miles. But yea it does sound like it may possibly be failing the regens hence the fuel addition. It also worries me that because there is a fault it won't do the regen and will then build up soot and do damage... Worried to drive it until fixed now!

 

Also most recently they changed the oil and that fixed it only for it to return a couple weeks later. If it were putting fuel into it and it wasn't completing regens. Why would it be that the regens would fail?

Sorry for all the questions just trying to get my head around it!

 

Weeks later your driving style/distances caused one or more failed regens (its required 20-200km) ................ every time the regen starts and fails the oil is contaminated more - after enough contamination enters oil the ECU simply says enough is enough.

Fail is possibly a misnomer in this case - I would say better word is not completing during your typical trips

 

Thanks LvR. I did quite a few long trips in the 2 weeks since the oil was changed. although I do have a short trip to work... but it also has never been a problem before. Seems a bit odd that it would be failing.
Maybe I'll get the oil changed again and go from there. 🤔

Anyhow I checked the oil level and it was quite high. Although I do not have anything to compare to so am not sure if it has increased.

 

Me? - I would change the oil and start a strict daily monitoring regimen.

Just so its said - leaky injectors can and do also cause exactly the same fuel dilution problems with associated higher than originally filled sump levels

If you now do change the oil I would think an immediate manual/forced regen is in order just to prevent skewing of results

 

Ok thanks for the feedback I think I'll get the oil changed and a regen and get them to have a look into the pipes and the sensors just to eliminate that as a possible issue.

I know the garage I go to has been very helpful in dealing with these issues so far and due to them changing the oil and regening it before have become stumped and concluded it to be a ECU error. I realise no one has mentioned that as being a possible issue. Do you think if I get all I have mentioned above (oil change and pipe checks etc) done and the error still remains that the ECU would then need a look at either repair/replace?

Thanks for the help ☺

 

ECU is the very last thing to blame imo ..................

The correct way to tackle this is to log all the engine parameters after the oil change for every trip and to have somebody that knows what he's doing inspect and analyze the logs

 

They believed they had looked at all possibilities so that was where they placed the blame.
I suppose asking what 'somebody that knows what they're doing' would be looking for would be out of my league!? 😅😂

Thanks LvR 😁

 

They believed they had looked at all possibilities so that was where they placed the blame.
I suppose asking what 'somebody that knows what they're doing' would be looking for would be out of my league!? 😅😂

Thanks LvR 😁

If you want you can get your own Renault speaking scanner and do the logging deed.

You can then post the logs back here and we can have a looksee ...................

Unless you understand the mechanical intricacies and dependencies of the various parameters its all just going to be gobbledygook that unfortunately cannot be explained in a few short sentences here at all - must say I am surprised that a garage would blame the ECU in such a hurry without giving any justification following a bit of sleuthing

 

Thanks for feedback. 😊
I've spoken to the garage and brought up all these points and they're going to thoroughly go over each and every option on Friday.
Fingers crossed. 🤞
I'll post a update when I know more.
Many thanks,
Abi

 

Ah - real world progress:

When it goes to the guys, ask for and have them issue you with a log of the values of all the engine parameters they saw for a 5 minute period while the engine stood idling at their premises.

If you can post it back here you can already learn an awful lot about the ECU and the general control system health

 

Will do! Thanks!!!

 

Hi KEV
Thanks for the quick reply
It's been on 4 diagnostics. Snap on,delphi, bosch and the last one can't remember.
Bosch was the last one. I'm sure they do all that. Will ask on Friday but I know they inform the ecu of any work they do
Regards
Les

 

Hi KEV
Thanks for the quick reply
It's been on 4 diagnostics. Snap on,delphi, bosch and the last one can't remember.
Bosch was the last one. I'm sure they do all that. Will ask on Friday but I know they inform the ecu of any work they do
Regards
Les

Don't need a scanner to clear those service/oil counters ............ gets done on the dash with the help of the buttons on the stalk.

You can check it now yourself (see owners manual on how to view when next oil service is due and how exactly to reset)

I have a feeling you need a new mechanic since imo with just about all those scanners he should have been able to motivate and stop guessing about what is going on.

If he tried and followed the contents/suggestions in this thread a regen must surely get triggered or a decent explanation/motivation must be forthcoming on the wasting of your money

I cannot believe the costs you have incurred in chasing this at all.

I would insist on a log of all engine parameters during a short trip with your engine using a proper Renault speaking scanner - the brand name of the scanner is irrelevant as long as he can produce the correct and complete information

 

Apologies LVR
Predictive text strikes again

 

Hi LVR
Point taken. It's been to 4 garages and I forgot to mention also a Renault dealership making 5. Renault scanned and forced a regen and nothing else. I tried to remove the lights myself last night but no luck. I'll try again today.
Thanks for the reply

 

Hi LVR
Point taken. It's been to 4 garages and I forgot to mention also a Renault dealership making 5. Renault scanned and forced a regen and nothing else. I tried to remove the lights myself last night but no luck. I'll try again today.
Thanks for the reply

You will not be able to clear the dash moans yourself - all you can accomplish yourself is to reset the service/oil counter - THAT action should allow an auto regen to happen IF environmental conditions are suitable and only once an auto regen has completed successfully AND the DPF has no other b.itching to do then the dash moans will clear automatically

Your dash has a builtin service indicator - what is it's value now? ................. it should be something like 15000km or 1 year

 

This problem can be caused by a dpf regeneration being carried out before resetting service reminder - the oil dilution pid should read 0% before the regeneration is done. If your oil dilution is over 10% an error is logged. This calculation is now stored in the ecu. Your dpf will continue to block up as regeneration will no longer happen . A new ecu will rectify this if installed correctly with out any of the old ecu data being transferred to the new ecu. If someone knows how to reset the ecu I am all ears.

 

It is now November 2023. The problem that you're having, or anyone now reading this is... your 'upstream turbo tube' is BLOCKED! If you look at the back of the engine, (mine being a 2018 1.6L) you will see there are two sensors'. The left hand one is what you need to remove, behind this is a rubber 90° bend that fits onto a small metal tube. get a bicycle brake cable / guitar cable / similar and push it down the metal tube. First off, you should use a hand gauge pump and when pumped it should read ZERO! IF there is any pressure, on the gun, then you have a blockage and that's your only problem! Get a battery hand drill, connect the cable to the drill and carefully push the cable into the small metal pipe, (this goes down to the vaporizer), and then remove the cable and double check, with the pressure gauge again. If it comes back with a reading of ZERO, all is cleared BUT, the small metal tube must be clear. You could then squirt some break cleaner down there. After this you need to do a DPF clean. get a foam can type of DPF cleaner then remove the tube, under the van, that comes from the sensor, there are two tubes coming from it... one goes to the back of the DPF and the other one goes to the front of the DPF... that's the one you need to pull off of the DPF then read the foam can instructions and pump it all into the DPF then run the engine and rev to about 3000 RPMs'. Clean the upstream sensor and put it all back and your van will run nice! I HOPE this helps someone today, as this is an old thread... good luck! Tom

 

Привіт тутHello everyone I have a Renault Traffic 3 1.6 engine 104 thousand mileage and at first I had problems the DPF filter was clogged I went to the service they told me to do a forced regeneration and change the oil I did that, first I did the regeneration, then I changed the oil, the regeneration was not successful, there were 9 grams of soot left and the error with the thin oil does not disappear, I delete it and it still appears And also 30 unsuccessful regenerations when I did the first regeneration then 67 grams of soot and still the regeneration was not successful the second regeneration was 26 also not successful what prevents it from doing regeneration help Please

 

Bunch of idiots telling you lies.


Regen and oil dilution are closely related - if the oil dilution is already a problem ANY regen will NEVER clear all complaints even if the DPF happens to contain ZERO soot.

MAKE SURE YOU HAVE NO EXHAUST OR ENGINE PRESSURE OR TEMPERATURE RELATED ERRORS PRESENT (EXCLUDE DPF REGEN REQUIRED MESSAGE)
Drive the engine till hot.
Change the oil and filter.
Clear the oil service indicator and confirm the ECU has this happening (oil service due distance will return to something like 15000kms or 1 year) - DO NOT CONTINUE TILL THIS STEP IS COMPLETED
Now idle the engine till forced regen pre-conditions are met (exhaust, coolant and oil temperatures).
Allow a forced regen to start and do not interfere - let it finish on it's own time and rate.

If you followed the recipe the DFP will be very close to 0 grams (NOT 0) and you will have no errors present about DPF or oil quality.

I am guessing you have not bothered to read the contents of the whole thread here, and as usual, are wasting a ton of money