2016 Peugeot 3008 Active 1.6Hdi DPF Query/Help

[BigStu09]

Hi,
Recently purchased a 2016 Peugeot 3008 Active 1.6Hdi (120) and after a few days back to the garage it went with warning light one (Under Warranty)
They diagnosed it and informed me it needed a NOX Sensor, Oil Pressure Sensor & Adblue Injector.
Repairs carried out and few hours later back on came engine light - back to garage with car.
Re-diagnosed this time told the it was DPF Pressure sensor and would get back later in the day, this didn't happen, phone call later in day said ready tomorrow as pipe going to sensor was blocked and needed to be cleaned out, again this didnt happen as when tomorrow came so did phone call saying it needed new pipe.
Three days later eventually got car back and just me being me I checked and all these parts have been erased, I also have a Autel MaxiAP200 code reader that works with my phone. Plugged this in and checked all codes were cleared - they were. Then had a look at live data and it says that soot levels were 140g...I considered this a bit high but a little internet searching says it can be between 0-250%.
So yesterday took it a three hundred mile drive with a good deal of motorway drive where I sat at a constant 80mph, car seems to run fine but really don't think I am getting the best Mpg out of it as only averaging 52Mpg max even when driving sensibly.
Got up this morning and thought I would check with code reader once again, all fine but live data now has DPF Soot level at 264g which according to the app is now in the red zone.
There is no dash warning lamps or anything on.

Does anyone know what the level should be at the max.
Does this point to blocked DPF and if so why no warning.

Will take it another good run today and see if it triggers a regen.
Will hopefully post back later with update.

Thanks in advance.

[GiveMeABreak]

You have to appreciate that the filter becomes clogged during normal driving until the engine ECU determines a regeneration is required. So you will have different readings each time you look at the data at different times after the car has been running. Once the DPF has regenerated, the soot loading is reduced back to zero or near zero again until the filter starts filling again.

If you have stopped the car at a time when it is regenerating, then the ECU deploys various strategies to complete the regeneration next time and the time after that until it succeeds. At any point where this fails to happen (i.e. with a lot of stop and start short journeys) then, the regeneration cycle may not complete as the engine gasses won't get hot enough. These need to be about 550 °C for natural regeneration to occur and about 450 °C for assisted regeneration to take place.

If it constantly fails to undertake a regeneration of the filter after deploying these strategies, then ultimately you will get a message up telling you the filter is at risk of blockage. At this point it should be taken for a steady drive that is sufficient for the engine to reach a decent temperature and to allow the vehicle to regenerate.

So it is quite normal to have different load readings at any given stage of driving.

[Paul-R]

What mileage has the car done? As the DPF gradually fills up with non-combustible ash the time between regenerations will gradually become less and less.

[BigStu09]

Thanks for reply.
I can appreciate that soot builds up as you drive and that once a regen has took place it will drop.
I considered 264g rather high and have since took it on a couple of hundred mile round trip and soot is now 430g it also says a regeneration took place 46km ago...no way will it build up 430g in such a short distance.
Car has only done 35000 miles but I have a feeling that this has been a town car.
Never understood why any would have a diesel with a DPF and only do a few miles every day. Wife is a carer and uses it (or would have if it wasn't in garage) every day for work but come days off then it is all over country.

[GiveMeABreak]

The amount of soot is only estimated by the engine management ECU. It incorporates maps that model the weight of soot present in the particle filter, according to the type of driving encountered by the vehicle.

The weight in grammes of the soot is calculated by the engine ECU taking into account:

• Emissions based on stabilised points of engine speed / torque that are recorded in the engine ECU mapping.
• A correction in accordance with the difference in the mixture

The combination of these two values determines the theoretical moment of the regeneration.

[Hell Razor5543]

Never understood why any would have a diesel with a DPF and only do a few miles every day. Wife is a carer and uses it (or would have if it wasn't in garage) every day for work but come days off then it is all over country.

I recall where one of the consumer programs (possibly Watchdog) 'went to bat' for somebody who had been recommended a car by a Ford dealership. The buyer made it clear they only did town driving, and only a few thousand miles a year. About a year later the car developed a serious problem. It turned out that it was a diesel with a DPF, and was totally unsuitable for the buyer. The dealership first argued (saying they would never had made such a recommendation), but once Watchdog got involved they quickly changed their tune.

[BigStu09]

Well been keeping a eye on this over last few days and soot weight is going up and down as would be expected with regeneration.
Fuel consumption on the other hand is now worse than before it had repairs carried out. Now only averaging 51mpg on a long journey - previously 53mpg and on short journey now only averaging 47mpg whereas previously got 49mpg.
I must say that I would expect a lot more than I am getting. Not naïve enough to think I would get what specs say - Urban 60.1, Extra Urban 74.3, Combined 68.9...I would however expect in the region of 60mpg over a long journey. Also have a 1.5dci Renault Megane (110bhp) and even that returns 61mpg over a long journey.
What are thought on this. And what kind of mpg is others getting.

[RichardW]

My 3008 with the earlier DV6C 115 engine does 47-50; my wife's C4 Grand Picasso with the same engine as yours struggles for 45 on a run, nearer 40 kicking about town. It will approach 50 on a long run where the speed is kept down to 50 / 55 (e.g. up the A9!). So yours looks about right....

[GiveMeABreak]

I concur - my 1.5 Blue HDi DV5 has the same rubbish. In my rural location with hills, I'm getting 45.6 constantly, which is far worse than the C3 1.6 HDi we just sold which returned 59-62 MPG for the same local trips! Talk about a downgrade.


These are the official figures for mine:

Engines Euro 6.2 (Euro 6.d-TEMP)	Low L/100 km (MPG)	Medium L/100 km (MPG)	High L/100 km (MPG)	Extra High L/100 km (MPG)	Combined L/100 km (MPG)	CO2 Emissions (g/km)	Reality Check Owner Average
BlueHDi 100 6-speed manual	5.4 - 4.9 (52.3 - 57.1)	4.8 - 4.2 (59.4 - 67.6)	4.6 - 3.9 (62.0 - 72.7)	6.0 - 5.1 (47.0 - 55.8)	5.2 - 4.5 (54.1 - 62.7)	104 - 109	45.6 MPG

There is a new test WLTP (Worldwide Harmonised Light Vehicles Test Procedure) used to measure fuel consumption and CO2 figures.

The CO2 figures shown are NEDCeq (New European Driving Cycle Equivalent), calculated using an EC correlation tool which converts WLTP figures to NEDC.

These NEDCeq figures are based on the outgoing test cycle and will be used to calculate tax for the first registration.

CO2 and fuel economy figures may vary according to wheel fitment and optional extras fitted.

[BigStu09]

Well time for a bit of an update.
I have been in contact with a Peugeot technician who informed me that yes fuel consumption does appear a little low and advises that there is a few issues for this.

He say that the 1.6hdi is know to have issues regarding valves not turning properly and advised to drive car for at least six miles with high revs 4900 - 5000 .... Have carried this out this morning.

He also says DPF is probably biggest cause of drop in fuel consumption as it restricts flow .... May have to investigate removal or drilling out - has anyone heard of this being done.

Fuel could also be a problem, Use ASDA fuel most of time. He said this is not the worst but to try a couple tanks of premium fuel as he has suspicion that this car has been a city car and this might help.

DPF does appear to be working as should with soot levels going up and down. It also informed me today while out and about that the Adblue level was low and needs topped up withing 1500 miles.

I must say the biggest disappointment is the fuel consumption and is one of the things that attracted me to buying this car (along with the comfort), I would never think that it it would get what the specs say but what it is returning is extremely poor and Peugeot should be disappointed with itself. When people bought this car new they should have been straight back to them saying they were selling this under false pretences.

[Hell Razor5543]

Certainly DON'T drill it out OR remove it! If you do your vehicle will not be road legal, as it would no longer conform to the emission levels stated when it was manufactured. People who have unknowingly bought cars with the DPF drilled out (ore otherwise removed) have then been sorely surprised when they have found out it was no longer road legal!

[GiveMeABreak]

He also says DPF is probably biggest cause of drop in fuel consumption as it restricts flow .... May have to investigate removal or drilling out - has anyone heard of this being done.

It's illegal to do for public road-faring vehicles, and not condoned on this Forum, so please don't ask for advice on this aspect.

Always better to repair and resolve issues, but as you say it seems to be doing its job now anyway.

[Dormouse]

Asda fuel comes from the same refineries as virtually all mainstream fuels in the UK. The difference is the additives that are put in the deliveries before they leave the refineries. Asda is not reknowned for spending much on additives. So, yes, fuels are different and using a better fuel if you can is no bad thing.

[Hell Razor5543]

Ever since the problem with Tesco fuel (10 - 15 years ago) I have always used fuel supplied by the producers (Shell, BP, etc.), and never had any issues (either with my own or company vehicles). You might want to drop some diesel injector cleaner in the tank, to see if that might help. I found an ebay seller that sold 3 doses of Wynns Injector Cleaner for a decent price (I have no connections with them);

https://www.ebay.co.uk/itm/143927389437 ... 2749.l2649

[Dormouse]

I once compared the difference on 3 cars in using Asda and Shell fuels over several hundreds of miles of exactly similar usage. The Shell fuels gave slightly higher mpg on each car, the overall cost per mile was about the same but, subjectively, all drivers agreed that cars using Shell fuel after Asda fuel noticed a change for the better after about a week from the changeover.
This was done several years ago but I have not heard anything that might change the situation about Asda's use of additives.
Fuels, especially diesel, are fine tuned with additives to adapt to the seasons as well as the current regulations.