Regen's AGAIN..

[Graeme67]

Does it always mean the car is doing a regen when the blue illumination on the engine symbol goes out, Because this car of mine seems to be doing regens for fun. Done approximately 150 miles since yesterday and it's done 3 regens (motorway driving),, Changed the oil yesterday (only done in April) because the level had risen. Had a look to see if i could take the DPF off and clean it but it looks like a swine of a job to do because of where it's located.

[Percy247]

Does it always mean the car is doing a regen when the blue illumination on the engine symbol goes out, Because this car of mine seems to be doing regens for fun. Done approximately 150 miles since yesterday and it's done 3 regens (motorway driving),, Changed the oil yesterday (only done in April) because the level had risen. Had a look to see if i could take the DPF off and clean it but it looks like a swine of a job to do because of where it's located.

Basically YES.

You seem to be in a very similar position to me and our Mazda 2 diesel with the distance between regens falling noticeably. Might been worth speaking with a local DPF specialist in the North East? How much has your fuel consumption increased since the increased regens started?

I have been putting off looking into mine as I have been busy with other things. I had been planning on cleaning the upstream O2 sensor that you can see in the intake manifold. I have also bought some DPF cleaner that you inject through the temperature sensor on the DPF whilst the engine is running. I also intend to check the differential pressure sensor and pipes leading to it. I believe this involves taking off the offside wheel and arch liner. I am not in any rush to do this as I have never seen a warning light on the dash, not had any fault codes and the car still does over 60mpg (my figures not BS trip computer ones).

Please feel free to DM me as I have done quite a bit of research on this issue in anticipation of this problem occurring!

I am torn at the moment as I would like to sort this out but plan on swapping the car in the next 6 months for a cheap petrol car as my daughter has just passed her test

[Graeme67]

Does it always mean the car is doing a regen when the blue illumination on the engine symbol goes out, Because this car of mine seems to be doing regens for fun. Done approximately 150 miles since yesterday and it's done 3 regens (motorway driving),, Changed the oil yesterday (only done in April) because the level had risen. Had a look to see if i could take the DPF off and clean it but it looks like a swine of a job to do because of where it's located.

Basically YES.

You seem to be in a very similar position to me and our Mazda 2 diesel with the distance between regens falling noticeably. Might been worth speaking with a local DPF specialist in the North East? How much has your fuel consumption increased since the increased regens started?

I have been putting off looking into mine as I have been busy with other things. I had been planning on cleaning the upstream O2 sensor that you can see in the intake manifold. I have also bought some DPF cleaner that you inject through the temperature sensor on the DPF whilst the engine is running. I also intend to check the differential pressure sensor and pipes leading to it. I believe this involves taking off the offside wheel and arch liner. I am not in any rush to do this as I have never seen a warning light on the dash, not had any fault codes and the car still does over 60mpg (my figures not BS trip computer ones).

Please feel free to DM me as I have done quite a bit of research on this issue in anticipation of this problem occurring!

I am torn at the moment as I would like to sort this out but plan on swapping the car in the next 6 months for a cheap petrol car as my daughter has just passed her test

I've had the car 2 and a half years now, And this has just started about 4 months ago... Fuel consumption has dropped slightly during everyday driving but not by much. I took the EGR valve off at the front of the engine and cleaned it, It wasn't that bad.. Still getting over 60mpg as stated by the display screen in the car. Been looking online and there's quite a few DPF specialists around here. Halfords are advertising on their website £85 to flush the DPF out, There's Terraclean but don't know if this would work... I'm in the same frame of mind now as yourself, I like the car and want to get this sorted but if it's the beginning of something then i'm seriously thinking of trading it in for a petrol car.. got the point now that i have to use my daughters car (petrol) for work because i just dont know when mine is going to decide to start another regen.. Tried Liqui Moly DPF cleaner in the fuel tank which didn't do much, And been looking at the cleaner that you inject through the system at the DPF Temp sensor, But just don't know... keep us up to date with results of the DPF cleaner you have got. Be very interesting what results you get.

[Percy247]

I have just looked on the Halfords website and see they offer a maintenance treatment for £35. I suspect this will be a £10 bottle of cleaning additive added to your fuel tank. With regards to the £85 deep clean service, I suspect this might be just a can of DPF cleaner squirted into the temperature sensor hole. Interestingly, unlike most products on Halfords website there are no review facility for either service. I might nip into our local one and ask what it actually involves.

In my experience taxi firms are the masters of running and knowing the best person to fix high mileage diesels with DPF issues. Chances are your local taxi firm will have a go to garage that sorts DPF issues both legitimately and illegally.

[Graeme67]

I have just looked on the Halfords website and see they offer a maintenance treatment for £35. I suspect this will be a £10 bottle of cleaning additive added to your fuel tank. With regards to the £85 deep clean service, I suspect this might be just a can of DPF cleaner squirted into the temperature sensor hole. Interestingly, unlike most products on Halfords website there are no review facility for either service. I might nip into our local one and ask what it actually involves.

In my experience taxi firms are the masters of running and knowing the best person to fix high mileage diesels with DPF issues. Chances are your local taxi firm will have a go to garage that sorts DPF issues both legitimately and illegally.

Plenty of video's online about knocking the innards out of the DPF and mapping it out but we know it's illegal. Makes ya think though... Yeah i don't have that much confidence in Halfords knowing a whole lot about DPF problems. Been looking online at local specialists, Seem to be plenty around here. Good thinking about taxi firms, They must have come across this sort of problem before... The company i work for bought 3 brand new wagons last year, They have done a fair few miles now, (About 30.000 miles each) We start at 4am until about 1 in the afternoon, Engine never switched off, Only do short(ish) journeys, Stop / Start, They do a regen about once every 2 to 3 weeks. They drink Adblue but they never cause a problem. So i cannot understand why our cars are so much of a problem.

[TEB]

In 2011 I bought a near new Skoda with the 2ltr VAG tdi which I used to commute to work, at that time a 50 minute drive on rural A roads, doing around 12-15k a year. In the summer I didn't get many regens at all, however in the winter it was almost daily. Local main dealer had no answer, however an owners forum suggested blocking up the lower part of the grill, as it was thought the engine may not getting hot enough in the cold weather, and indeed this did reduce the number of regens in the winter.

[Percy247]

I used to think a DPF delete was the solution. However, I have read on a couple of forums, instances where people who were having frequent regen issues and chose to have the DPF removed and it was found to be in almost new condition!

I believe the EGR system is what causes the high levels of soot in these engines that block up the inlet manifold, sensors and the emissions system components that is the real problem.

If I was going to keep the car long term I think I would be looking at getting the inlet manifold and engine ports cleaned and then blank off the EGR with a map to delete it from the ECU.

[Graeme67]

In 2011 I bought a near new Skoda with the 2ltr VAG tdi which I used to commute to work, at that time a 50 minute drive on rural A roads, doing around 12-15k a year. In the summer I didn't get many regens at all, however in the winter it was almost daily. Local main dealer had no answer, however an owners forum suggested blocking up the lower part of the grill, as it was thought the engine may not getting hot enough in the cold weather, and indeed this did reduce the number of regens in the winter.

i drove down to Norfolk in the summer on holiday, The weather was balmy hot (30 degrees plus) yet the car still did regens like there was no tomorrow. I initially thought the same the temperature but doesn't seem to make any difference to mine, Hot or cold it carries on doing it's continuous regens.

[Graeme67]

I used to think a DPF delete was the solution. However, I have read on a couple of forums, instances where people who were having frequent regen issues and chose to have the DPF removed and it was found to be in almost new condition!

I believe the EGR system is what causes the high levels of soot in these engines that block up the inlet manifold, sensors and the emissions system components that is the real problem.

If I was going to keep the car long term I think I would be looking at getting the inlet manifold and engine ports cleaned and then blank off the EGR with a map to delete it from the ECU.

Wonder if Terraclean would do anything. They say it cleans everything , But not sure about EGR valves, Exhaust manifolds and turbo etc.

[jtonline]

I think if you have cavitation erosion of the injector tips it causes poor combustion and increased particulate matter in DPF.