[LvR]

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

 

[LvR]

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

 

[LvR]

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

 

[LvR]

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

 

[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

 

[LvR]

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

 

[LvR]

Hi guys
I have an identical vehicle with identical problems.
My OBD 11 gives a p253 code but Google says it's a oil dilution code. My book says injection pump metering control low
The oil has been changed 3 times in the last year using the correct oil from Renault. It still refuses to regen
Last time replaced diesel spray valve (5th injector?) on turbo housing. Apparently blocked.Glow plugs done. Turbo sensors changed. Even turbo changed
Cost over 3k in the last year
All codes reset and deleted. Sensors changed and pipes checked on dpf.
The garage I'm using is the mechanics' choice for problem solving
Going back in Friday but at wits end
Any other ideas

Was the service/oil change counter reset after each of the oil changes?
What exact scanner are you using?

 

[LvR]

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

 

[LvR]

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

 

[LvR]

Hi again LVR
Have checked service interval light. It's set for 9600mls
It was offering a service in 8300 mps so all seems in order there.
Lights have gone out before I did this but will guarantee they will be back in a while saying check emissions then move to injector fault. I'm taking it along the motorway while the lights are out. Hopefully it will regen but doubt it will sort the root cause.
Will let you know how I get on tomorrow
Regards
Les

............... before what?

OK I really think you need to call a halt here and start documenting/logging your exact trips and the type of trips (duration, distance, ambient temp) ......................

Lights have gone out before I did this but will guarantee they will be back in a while saying check emissions then move to injector fault. I'm taking it along the motorway while the lights are out. Hopefully it will regen but doubt it will sort the root cause.

If you can now say the moan has just disappeared then obviously the ECU is busy monitoring the DPF and decided its possible to allow a regen ................... Regen takes quite a while on the road (20 minutes + at higher engine speeds - 2000rpm+ possibly 60mph+) and under load.......................

NOBODY including myself without the help of a proper Renault speaking scanner will be able to say when/if a regen that may have gotten triggered completed successfully! ............... if your motorway trip's environmental conditions and duration is such that the auto regen is interrupted then I GUARANTEE THE DASH MOAN WILL BE BACK - ITS SUPPOSED TO BY DESIGN AND ITS TO BE EXPECTED.

Hopefully it will regen but doubt it will sort the root cause.

If a regen got triggered and completed successfully the lights will go out.

If after a trip or 2 covering only short distances with no real engine work required, the lights will get triggered again if your driving style prevents the complete conversion of the soot into ash that can be expelled from the exhaust/DPF (auto regen)

I feel confident saying the root cause is actually pretty well defined .............

DPF Short Journeys and Town Driving - (dpfproblems.net)

 

[LvR]

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