Hi silver1011,

to hear your in the same boat but the symptoms described sound even more concerning, particulaly two blown turbo's and FOD filled oil :S

Hope the technician from Arizona who looked at it last time is on holiday for this visit to your dealers :yes:

TP

Thanks TP, good luck to you too, keep smiling

Well have the Monster back again but still not fixed; however hallelujah they have at last agreed there is a fault with the PDC volume adjustment Problem is the control unit they fitted recently was the wrong one (tell me Skoda parts system gave them the wrong number for my car :wonder: ); hence loosing the front sensors and the correct one is on back order. Full circle to where I was in October when Allams looked at it and agreed there was an issue but the part was on back order then :( For the time being they have at least refitted the original controller so I have the front sensors again.

Unfortunately still no further forward with the DPF, get the impression nobody at the dealership knows much if anything about them. They tell me their still waiting for advice from SUK Technical, as to if regenerating every other day is normal and if not why no fault codes. That's how their viewing it at the moment anyway. Will have to keep pushing Customer Services on this one to get an answer from the manufacturer if necessary.

TP

Well have the Monster back again but still not fixed; however hallelujah they have at last agreed there is a fault with the PDC volume adjustment Problem is the control unit they fitted recently was the wrong one (tell me Skoda parts system gave them the wrong number for my car :wonder: ); hence loosing the front sensors and the correct one is on back order. Full circle to where I was in October when Allams looked at it and agreed there was an issue but the part was on back order then :( For the time being they have at least refitted the original controller so I have the front sensors again.

Unfortunately still no further forward with the DPF, get the impression nobody at the dealership knows much if anything about them. They tell me their still waiting for advice from SUK Technical, as to if regenerating every other day is normal and if not why no fault codes. That's how their viewing it at the moment anyway. Will have to keep pushing Customer Services on this one to get an answer from the manufacturer if necessary.

TP

Hi Tim

One thing solved but still left with the other problems ,did they do any tests on the pressure switch for the DPF or test any other components to do with it :wonder: , or just plug it in to the computer again and see NFF.

Don't think that with your drive to work and back it should regen at all, swmbo and me have not noticed a regen on the 110 for mouths even with the colder weather and a lot shorter drive than you, plus a few start stop moves during the day, like you said sounds like you need a better GP to look at it :wonder:

Hi Kevin,

everything I read to do with the DPF would suggest that there's something amiss; most information states active regeneration should only start with a soot loading of around 45%. When the dealer took a load reading it was 0% and shortly after that it regenerated :wonder:

Have read one American VW site that its 45% or every 400 to 600 miles for an active regeneration, however even if that was correct I reckon the Monsters doing no more than 100 miles at best per regeneration currently.

Re pressure check, don't think they even know there's a differential pressure sensor in the system; got a blank look every time I've mentioned it.

Oh found this site which is a reasonable read on the subject;

My link

Regards,

TP

Re pressure check, don't think they even know there's a differential pressure sensor in the system; got a blank look every time I've mentioned it.

Tim

The differential pressure sensor is the only reported DPF failure on another forum, often caused as result of condensation from the exhaust.

My link

Good luck

That's the problem with cars these days, too complex to fulfill their basic function, pushed by legislation and marketing.

With regard to the DPF, with NFF, they should then be looking at the data in conjunction with how the system works. For it to regenerate, there must be a soot threshold at which this is instigated. Working on that, they need to see what is been reported by the pressure sensor. The sensor may be within its operating parameters but continuously reporting the wrong pressure across the filter, for a start with the engine not running, you'd expect the same pressure either side of the filter or 0 differential pressure.

It could be the sensor, a blockage in the pipes to the sensor or an internally defective DPF. Seems like a lot of hassle over the problem, but they could replace the sensor quite easily and it's only £40, unfortunately they may be constrained by procedure, so if the computer doesn't tell them to replace it, they won''t get paid for replacing it.

Tim

The differential pressure sensor is the only reported DPF failure on another forum, often caused as result of condensation from the exhaust.

My link

Good luck

Thanks for the link and condensation line of enquiry.

Been having a look at my copy of the Elsawin 'service book', appears the differential pressure sensor is a very fragile piece of kit with plenty of warnings about not disturbing/removing it in any way unless damaged. Also mentions blowing out control pipes before installation to clear blocked/iced up condensation. Intrestingly the sensor is mounted alongside the top of the engine near the fuel lines and connected to the DPF by long sensing pipes; always wondered what that valve was for.

Will have a look tomorrow to see if there's anything obviously wrong with the installation :wonder:

Sensor item 5

Many thanks again,

TP

Are all new diesels expensive money pits?

TP imagine how much this could cost the poor sod who has this problem out of warranty...

Hi John,

in a word yes; environmental considerations and having everything controlled by electronics makes repairs an expensive business but not helped by Techs who haven't a clue what their doing and blunder around wasting their customers time and money, when good fault fining could have the problem solved in less than half the time.

A modern diesel engine schematic;

TP

Which is why i switched back to petrol, still did 48.5 average on a motorway run to glasgow last night.

Sent from my GT-I9100 using Tapatalk

Hi John,

in a word yes; environmental considerations and having everything controlled by electronics makes repairs an expensive business but not helped by Techs who haven't a clue what their doing and blunder around wasting their customers time and money, when good fault fining could have the problem solved in less than half the time.

A modern diesel engine schematic;

TP

Wow - that right there is why i don't have faith in modern diesels and there reliability over a longer duration given anything but ideal running circumstances - far too complex nowadays due to legislation. Best of luck with getting the issue resolved Tim.

And that's a simplified diagram, not showing any variable vane turbo boost control or the glow plug control systems. Then there's the fragility of the system that doesn't take kindly to misfuelling. I think that they are too complex and will be expensive to fix when out of warranty, the trouble is that petrols are going along similar lines, more power and efficiency from ever smaller displacements, which doesn't give me confidence in their durability.

I felt the same when they ceased using inner tubes in tyres...