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Discussion Starter · #1 ·
Hi can any member tell me if the DPF on the Antaracarries out a passive clean say when for example doing a motorway drive of a 100miles doing over 2000revs when the temperature gets high enough to burn the particles
Just wondered if it worked like the article I have looked at in an AA explanation
<h4 style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 0.875em; vertical-align: line; font-weight: normal; color: rgb54, 51, 41; font-family: Helvetica, Arial, sans-serif; -: initial; -attachment: initial; -size: initial; -origin: initial; -clip: initial; -: initial; -repeat: initial;">Passive regeneration</h4>Passive regeneration takes place automatically on motorway-type runs when the exhaust temperature is high. Because many cars don't get this sort of use car manufacturers have to design-in 'active' regeneration where the engine management computer (ECU) takes control of the process.
 

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Don't think it does like the Captiva my husbands car, my light was on two three weeks ago done it's thing yippee then today it came on again could not finish it so I will complete it tomorrow
 

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Yes it does work exactly as described in this AA info, passive regen will take place on long motorway runs, the biggest issue people seem to have with the Antara is active regens, where the car injects extra fuel into the DPF on the exhaust stroke which then burns and creates intense heat happens at around the 500 mile intervals irrelevant, so you could just pull off the motorway after a 490 mile drive and the car start one a few miles later.
 

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Discussion Starter · #6 ·
popped into my local Vauxhall dealer today and had a chat with the service managerhe said that you can do a regen any-time to clear the DPF by driving for 10miles at 3500 revs down a motorway or dual carriageway,this he recomends if the car spends a lot of time in town
in fact when a car comes into the garage with a blocked one and they perform a controlled regen he told me they can only clear 25% of the blocked DPF,it is then recommended that the owner does as above
SGJ I don't know ,but it would make sense to me that a controlled regen by the EU would only come on if certain things were true one of them being when the pressure sensors in the Dpf dictate that a regen is needed and it is starting to fill
the manager did agree with the AA and it was his opinion that cars fitted with DPF filters needed to be driven at times at high revs to generate the heat neeaded to produce a burn
and to that I will throw another thought into the subject my friend reckons he never got a regen until he did 1200 miles now is this down to driving style as he does a mixture of driving but very rarely uses 6th gear as he is of the opinion its to high
 

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I appreciate that you have been told this by a Vauxhall dealer but it is not the conventional wisdom of this site nor is it my experience. My Antara does a regeneration every 500/520miles irrespective of how it has been or is being driven at the time the regen commences. I believe, and I think others also believe, that routine regens occur at preset mileage intervals and driving style or sensors play no part in this. Sensors only become involved if routine regens are interrupted and the dpf begins to clog up.However I am willing to change my opinion in the face of evidence to the contrary. In almost 2 years of ownership and 16K miles I have not had a regen light yet.
 

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Discussion Starter · #8 ·
thanks for the comments superspark,I guess time will tell as I have not had the car that long , and like you say from previous comments there are a lot of people who seem to have regens every 500 miles or sothe one thing I don't want ,is to see that light on if I can help it
what sort of mileage driving does your car get ,ie long journeys, short or a mixture and do you tow
 

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I got my new 163 manual exclusiv on 23-10-12 and have done 15590 milessince then. I am retired so me and the Antara have both had quite an easy life. I live in a small town so I do very little stop/start city driving. There is no daily commute and it can be stood for up to a week without moving. I do quite a lot of 100 mile trips cruising at 70/80 in 6th. I do not tow. I guess I have had about 30 regens and only about 6 have been interrupted. I use supermarket diesel and no additives. So as I say she has had a relatively easy life.
 

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The cars ECU is programmed to do an active regen every 500 miles give or take a few unless the pressure sensors detect a blockage if is it will start one as soon as driving conditions allow, this normally being the car is up to running temp. Passive regens are nothing more than the normal heat created by driving over a long distance this continues heat burns the soot in the DPF.
A dealer can complete a forced regen with the car stationary by using the cars ECU, believe me this would make you cringe to watch your pride and joy with its engine screaming for 15 minutes.
A DPF warning light on the dash board comes on if you miss a few active regens it is the car telling you to keep driving, it's not a problem as long as you don't ignore the dash board warning, do this and you face the dealer doing a forced regen at the best, worst a big bill for a new DPF..
 

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The Antara does not have a passive regen system. The regens are on a fixed cycle controlled by the car, and it doesn't matter if you bomb up the motorway at 100mph. You will still only get a regen about every 500/520 miles regardless of how fast you drive.
 

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Good explanation in following linkhttp://www.hypermiler.co.uk/technical/the-diesel-particulate-filter-dpf-faq

Like others i found regardless of journey my Antara would do an active regen around 500 miles. It never seemed to do a passive regen even driving 400 miles at motorway speeds. I never had dpf light come on though so I just drove car same as any other.


Whilst my current car i have seen one active regen in 7000 miles rest have most probably been passive.



Edited by: HoneyMonster
 

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SJG said:
Please explain passive regeneration Inchindown ....
A passive regeneration is where the exhaust system is cleaned only by the heat from the exhaust, during normal driving,without any intervention from you or the car.

The Antara carries out an active regeneration by injecting fuel into the exhaust manifold which has the effect of pushing the exhaust gas temperature much higher than you get with normal driving. These hot gases them burn off the soot in the DPF. The Antara does this in the background at approx. 500 mile intervals.

If the regen fails to complete, the car will try again next time you drive. If it fails to complete several times, you will get a warning light telling you to complete a regen. If you do not do this, you will then get a flashing light which is warning your DPF is almost full. Failure to complete a regen after the warning light flashes will cause the filter to become totally blocked and it may cause some damage.

A blocked filter may be able to be cleaned by your dealer, but there is a possibility of having to replace the complete filter assembly. I believe this would not be covered by your warranty.

I've had my car for 18 months now, and have never had any problems with the DPF system. I get about 520 miles between regens on average. I've never had the warning light on at all. It has just been a non-issue for me.
 

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My Antara is just over two years old now and as far as I can tell it just gets on with regens as and when needed. I do not do a lot of miles these days except when we are towing the caravan, preferring to use a smaller car for local journeys. I tend to reset trip B when I notice the 999 figure has disappeared from the screen and interestingly this occurred earlier in the week. When I reset the trip it was reading 1700 miles so I assume it had carried out at least two possibly three regens without me noticing.
I assume that this is how it is designed to work andI have only had one yellow light due entirely my own doing when I had a couple of weeks of very short journeys, a quick blast down the motorway and it has not returned. When we tow the caravan the period between regens gets longer anything up to 800 miles, not sure why but one school of thought on here is that the extra weight makes the engine run hotter so reducing the need to clean.
Off to France soon so will check again.
 

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Discussion Starter · #17 ·
Thanks for those interesting comments , I did read that the antaras dpf system is further up the exhaust system than most cars and because of that it tends not to get hot enough to burn soot , on a passive clean , unless the car is towing or under load , so I can see how it makes sense that most take place over 500 miles or so through the pre programed EU
 

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So a passive regeneration is no more than enough heat over a long time being able to burn the soot out the filter, so an Antara can passively clean BUT Vauxhall recognise that most owners would never continuesly drive in a manner that would allow passive regeneration to clean the filter so they programmed an active regeneration into the cars computer, every 500 miles or sensor based.
This was my point earlier on in this thread a passive regeneration is just enough heat over a long time...so it does happen...
Bobbyt - The DPF on the newer 2.2 engine is directly after the turbo, virtually behind the radiator, the older 2.0 it is further back in the exhaust as you say.Edited by: SJG
 

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SJG said:
So a passive regeneration is no more than enough heat over a long time being able to burn the soot out the filter, so an Antara can passively clean BUT Vauxhall recognise that most owners would never continuesly drive in a manner that would allow passive regeneration to clean the filter so they programmed an active regeneration into the cars computer, every 500 miles or sensor based.
This was my point earlier on in this thread a passive regeneration is just enough heat over a long time...so it does happen...
Bobbyt - The DPF on the newer 2.2 engine is directly after the turbo, virtually behind the radiator, the older 2.0 it is further back in the exhaust as you say.
As far as I'm aware, the Antara does not carry out passive regens. This is because the exhaust gases don't get hot enough without the fuel being injected into the exhaust.

In the 18 months I've had my car i've only ever had active regens, regardless of how I've driven.
 

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Yip active just like the one I had today it was flashing and ding dinging had to drive 25miles to get ride of the bugger and it's only been 2 to 3 weeks since the last one I wonder it was because I have started the great college run 74 miles a day with mixed driving so I done 222miles then added an extra 130 miles that's 352 miles mmmmmm
 
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