Hi guys,
I bought my 2009 1,6 Citroen C5 recently and it already had this error. I've done 2000km motorway and is still there. I've done a little bit of research and So far not encounter a happy ending. It's my first car with DPF filter. Is this such a nightmare? I'm going to regret that?
Anyway, it se ms to that the auto regen haven't solved the problem;
is there anybody with a success in solving the problem?
update: I've done a test with Lexia and there is no blockage. It was 18% full and after a forced regenerating now is at 0%-1%. No faulty EGR too.
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Risk of particle filter clogging
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- TodiCroitor
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Risk of particle filter clogging
Last edited by TodiCroitor on 15 Jun 2016, 07:27, edited 2 times in total.
- GiveMeABreak
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Re:
First thing, get a Lexia on it. There are several things that can cause this: low DPD additive, preventing regeneration, blocked EGR (valve sticking) which can affect the gas temperature used in regeneration; Waste gate Vacuum Solenoid failure leading to overboost, which can cause reduced performance (limp home mode).
If you get it on the Lexia, you should be able to see the
level of blockage in the DPF. If the filter is clogged up past 80-90% then regeneration may not work and the filter will need cleaning out or replacing. So a Lexia session should be one of your first actions.
If you get it on the Lexia, you should be able to see the
level of blockage in the DPF. If the filter is clogged up past 80-90% then regeneration may not work and the filter will need cleaning out or replacing. So a Lexia session should be one of your first actions.
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Marc
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Re:
Also remember, a lot of M-Way driving can be at low revs.
Worth a try to keep the car in a lower gear and keep the revs up (3.5+) for up to half an hour drive up the motorway....give it some Italian tuning before the Lexia session.
Worth a try to keep the car in a lower gear and keep the revs up (3.5+) for up to half an hour drive up the motorway....give it some Italian tuning before the Lexia session.
Alasdair
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Re:
Mine (a 2.0) does this almost randomly and has done since I got it with 20k on the clock. You can go months with no warning, then 'bing bong' at the most unexpected times like travelling at speed on a Motorway in the very conditions the handbook tells you to drive at to clear it. It will have a day or two of bing bongs and then it ceases for weeks and weeks.
Iv'e never really worked it out. There may be a correlation with buying diesel at my local village garage which is not a big brand, so I've stopped doing that and maybe its less frequent now. I'm not sure of high revs help - if anything, low revs and pushing plenty of fuel through seems most likely to clear it, so going uphill in 6th on full throttle when you really should be in 4th.
The warning rarely clears whilst I am driving. Pops up on a motorway, service light stays lit, 150 miles later stop for a break and its all clear on restart.
But - nothing conclusive and the one time I did take it to a dealer lexia showed nothing amiss.
maybe maybe maybe, if you are really lucky, it will just go away. But maybe not as you have done so many miles with it on, 2000 Km is a long way.
Iv'e never really worked it out. There may be a correlation with buying diesel at my local village garage which is not a big brand, so I've stopped doing that and maybe its less frequent now. I'm not sure of high revs help - if anything, low revs and pushing plenty of fuel through seems most likely to clear it, so going uphill in 6th on full throttle when you really should be in 4th.
The warning rarely clears whilst I am driving. Pops up on a motorway, service light stays lit, 150 miles later stop for a break and its all clear on restart.
But - nothing conclusive and the one time I did take it to a dealer lexia showed nothing amiss.
maybe maybe maybe, if you are really lucky, it will just go away. But maybe not as you have done so many miles with it on, 2000 Km is a long way.
Richard_C
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Re:
I'm no expert, but I believe after a certain mileage Citroen recommend renewal of the DPF - I also believe on older Citroens (earlier C5's) it was with an exchange unit. Yours has c.120k miles, so this may be the issue. I acquired a C5 2.2hdi 2002 earlier this year, and my DPF was showing "blocked". I removed and jet washed it out at, and it does seem to have worked - some 2000 miles later I seldom get the blocked message (but I think this is related to cr** being cleared through the engine - it had spent the last 50k miles being driven like a little old lady around town). when mine wasn't running well it was really poor on fuel consumption, although again I suspect other issues throwing a spin ball in - EGR and a faulty boost pressure sensor. I'm using the car for regular good runs, and it seems to be helping - the engine is a lot livelier and more economical. If you go the jet wash out route remember the run off water will be full of nasty toxins, so shouldn't go down a drain
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Re:
Try the forced regen on a motorway/dual carriageway. You need to get the car up to about 50mph in 3rd and leave it in third for a long period. Its not particurlarly mechanically friendly but you are trying to generate heat to burn off the carbon deposits in the DPF. Travelling at 80mph in 5th/6th wont generate the heat needed.
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Re:
Failing the above "italian" methods, you could always see if the DPF is detachable from the cat (some are 1 integrated unit), and if you can separate the two, give it a good clean with carb cleaner or a steam jet wash.
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Re: Re:
I tested the car and everything seems fine. DPF was at 18%. done a force regenerating and now is at 0%. it was a little bit weird at DPD additive since it showed something like 30k ml. EGR was without errors.GiveMeABreak wrote:First thing, get a Lexia on it. There are several things that can cause this: low DPD additive, preventing regeneration, blocked EGR (valve sticking) which can affect the gas temperature used in regeneration; Waste gate Vacuum Solenoid failure leading to overboost, which can cause reduced performance (limp home mode).
If you get it on the Lexia, you should be able to see the
level of blockage in the DPF. If the filter is clogged up past 80-90% then regeneration may not work and the filter will need cleaning out or replacing. So a Lexia session should be one of your first actions.
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Re: Risk of particle filter clogging
The ONE and only time mine has thrown this fault message, I had to BOOT the Car hard just after I had started out on a cold morning due to a mad quarry truck......never since.
Alasdair
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Re: Risk of particle filter clogging
What's the indicated pressure drop across the DPF? It might be that the pressure sensor is goosed and giving a high reading (it goes to 128mabr if it's had it) - it should be reading 0 at idle, and only rising to 20-30 mbar at 3000 rpm
Richard W