yugs

It would be nice if my service booklet stated that the DPF needs replacing at 50K. It says clean, which we now know the dealers cannot do & means an exchange for a cleaned unit from Citroen (& which the dealers cannot easily afford to stock). Are Citroen providing the same design of DPF in exchange & is the fluid the same (rhetorical question). If they go for a later DPF & go for the new Eloys fluid then a new calibration would be req'd & that means a re-flash of the ECM if it's programmable, which I doubt, or more likely a new ECM & cal'. This might well mean an improved system performance, less warranty problems, extended service interval, dealers stocking the one type of fluid, etc. etc. but, the gent below mentioned a potential bill of upto 800 pounds - Phew! Is the poor old customer, in certain circumstances, having to meet the costs for this sort of thing I wonder. Enough on this subject for me for now. Touch wood - my C5 has not given me any troubles at all to date (apart from excessive rear tyre wear - courtesy of my driving style & a suspect rear subframe it seems - I'll live with the tyre wear as I won't be paying for the subframe). Apart from looking like a French Hearse, it's a stonking good car & I'm really quite fond of it. It's my 2nd C5 as well, so I must like them. We'll have to wait & see what happens when the top up additive warning message appears .... :blink:

Ahh, that's enlightening. I'm very grateful for that posting. I had read that PSA had changed the Eloys fluid chemistry & the DPF design and extended the service interval to 75000 miles on later C5's. Why can't a DPF be exchanged without having to top up the fluid again? and just what is the declared service life of the DPF supposed to be? I don't mean to hassle you but you are my only source of info on the subject at the moment & your comments are much appreciated.

Thanks for that information kfk. Do you happen to know what the stated service life is for the DPF? I would have thought that if the regenerative system is doing its job properly then it should be keeping the DPF in working condition. I cannot figure out from the service booklet what the stated service life ought to be for the DPF. Again, I'm confused as to why the topping up of fluid would cause a problem if the regenerative system is doing its job. I have read that the fluid doses the fuel & this is to lower the soot burn off temp during regeneration, so why should topping up the additive effect anything if regeneration is taking place as and when it ought to as one is driving along?

I would try & find a dealer who is willing to top up the fluid only & then see how you get on. On my last C5 the dealer topped up the fluid only at a cost 147 pounds at 56,000 miles & I sold the vehicle at 76,000 miles. If the regenerative system is working on your vehicle why should the DPF need replacing so early? If you do a lot of motorway miles you are probably providing about the best duty cycle for the regenerative system to work at its best. A new ECU sounds ridiculous unless Citroen are taking the opportunity to make some major changes to the regen' system because they have had problems & are passing on the costs to the customers. I'd love to know just what they are up to. Changing ECU's, fluid types, DPF types - it all sounds fishy to me & doesn't bear much relationship to what they state in the handbook.

:D Blimey-O-Riley! That's painful. I hope to goodness that when the time comes on my C5 (upto 57,000miles now) I really hope that it is just the "top up diesel additive fluid" warning message that comes on & then I can have a battle royal with the dealership to just top up the fluid & leave the DPF alone or clean it, not replace it.

Don't really know. If a DPF gets particularly blocked there is a small risk of a "thermal incident". I'd be tempted to get it in sooner rather than later. When you do take it in why not quiz the dealer a bit about how many C5 DPF's they are replacing these days? Good luck, I hope it's not too expensive!

Don't really know. If a DPF gets particularly blocked there is a small risk of a "thermal incident". I'd be tempted to get it in sooner rather than later. When you do take it in why not quiz the dealer a bit about how many C5 DPF's they are replacing these days? Good luck, I hope it's not too expensive!

:angry: The purpose of the EOLYS fluid (a Cerin-based additive) is to decrease the soot burn-off temperature, I appreciate that the fluid is added to the diesel during tank filling. Periodic filter regeneration is accomplished by post-injection in the expansion phase between 350km & 800km dependant on drive cycle. My beef with Citroen is that the DPF is not supposed to be replaced at 50K miles, in fact the service book states that it should be "cleaned" every 50K miles & the EOLYS fluid level checked. I have a strong suspiscion that they have had a problem with the DPF's giving too larger a pressure drop as the regeneration system has not been working as it was supposed to. Citroeneddie's experience tends to suggest that I'm right. I suspect that Citroen, if now replacing DPF's at the 50k service interval, are passing on the cost to the customer (i.e. me, & I'm not too pleased about it).

At 50k service on my C5 I'm told that they no longer just top up eolys fluid but now also change the DPF. I baulked at this & they did not top up the fluid or change the DPF at the service. Does anyone know why it is necessary to change the DPF? I did not have to on my previous C5, all they did was to top up the additive. Why the change in the service policy? Are there field problems with the DPF's giving too higher pressure drop at high mileages? Anyone know the reasons?