Andy you've really put me off now :-( looks like I bought the wrong thing. I looked for about two months - mostly at Galaxys, Sharans, Alhambras - didn't find a single nice one in my price range - all been round the clock, tatty inside etc. Found a couple of nice Espaces but I much preferred the Peugeot inside. But from what you're saying it isn't a sensible family car :-(

I will try what you said, Bigtee - thank you very much - but to be honest I wonder if I should sell it on and get something else. It doesn't sound like I'll ever get much to the gallon. Going on those figures Andy what should I be averaging on a full tank? The 24mpg I quoted was worked out from a full tank - mostly 10-20 mile journeys on dualcarriageways. I use it round town a bit, and hardly ever on motorways.

Well I need a 7 seater yes, and it was the best one I found, but I honestly thought it would average around 40mpg :-(

I'll get it serviced and see if it improves. Thank you so much guys.

It's a big heavy car and I'd be amazed if you consistantly achieved 40mpg. As well as servicing and maintenance the biggest factor concerning fuel economy is the type of journeys you do and the way you drive. Don't expect good MPG if you mostly do short trips or drive with your foot to the floor. Most people who own diesels usually like to exaggerate how good on fuel their cars are. I have a diesel and if I drive very steadily on a long run it is possible to see 60mpg. But my everyday average is actually more like 42mpg. That just illustrates how people often cherry pick.....

In that case firstly check to make sure the air intake hoses haven't fallen off or have split, especially from the turbo to the inlet manifold. Assuming they're all ok the fault could lie with the Mass Air Flow (MAF) sensor, Turbo Boost Sensor or Turbo itself.....

You are starting to find out why they won the golden carrot award.If it is not a pipe dropped of then more than likely the turbo is going or gone very expensive to put right.

I am pretty sure it does not have a DPF.

Thanks everyone. I totally wish I hadn't bought it now. I'm a single mum and skint so if the turbo's gone I'm stuffed! I spoke to my (not very helpful) ex who's a mechanic and he said it might be the fuel filter or a turbo pipe so he's going to do those next week; he hasn't got time til then, so I'll post back and let you know. Hopefully he'll service it for me too.

Edited by smspencer on 02/08/2010 at 21:19

Just done the motorway thing, and it didn't work :-( At least I know it's not that though I suppose. It ran fine for about the first 20 minutes, then once it was well warmed up it lost power again so I drove it home like that. A couple of times it felt like it was about to go if that makes sense - I could sort of feel it bite like it wanted to go but couldn't. I'm worried it's the turbo now :-( It isn't smoking though - that must be a good sign?

Took the car in today for a new fuel filter. When they took the old one out it was really black and they said that could be the problem. Drove it and after 20 miles the same thing - big loss of power. He also looked at the turbo pipes and stuff, and said there was some oil there and a couple of connections were loose which he tightened, but it obviously wasn't that either. He said he doesn't think it's the turbo as there's no smoke. Anyway what I'm wanting to know is do you think the fact that it only does it after about 20 miles ish is significant? It's absolutely fine until then, then it just goes and stays gone. No smoke, no warning lights. I also asked him about the mass air flow thingy - he said he checked it and it's fine.

Thank you - I will post on there.

I don't think it's going into limp home mode because doesn't that restrict the revs? It isn't doing that - it just accelerates really slow - kind of feels like the handbrake's stuck on.

I had a C5 with DPF & Eolys system.

There was a pressure sensor located on the bulkhead with 2 rubber pipes that connected to either end of the cat/DPF filter which measures the differential pressure accross the filter. When the pressure reaches a pre-determined level it will trigger the alarm message on the dash.

If one of the pipes becomes detached or leaks or the pressure sensor fails then no message.

On the C5 you can detach the DPF from the cat ( 3 nuts ).

Once off the car it can be jetted clean with a high pressure water jet, then once dried out re-fitted to the exhaust & good for another 50k miles.

Eolys used to be about £25/litre from Peugeot/Citroen dealer.

Just so others know - you cannot wash a DPF! The cars with the eolys fluid have a FAP filter and these apparently can be washed. A DPF has a catalyst built in that is used to burn off the particles at high temperature.

Don't want anyone thinking a DPF can be pressure washed do we.

FAP is just the name Cit/Pug give to the system, it is still a Cat & DPF bolted together.

To enable cleaning or exchanging they have made it detachable from the Cat.

Because it is located under the car some 2/3 feet from the exhaust manifold they have had to add the Eolys fluid so that the particles will burn at a lower temperature.

The exhaust gas will have lost some heat by the time it reaches the filter.

Modern systems have the Cat/DPF located on the manifold to avoid this.

Your garage have told you there is no Eolys, the filter cannot regenerate (clean) itself without the Eolys as it can't get to a high enough temperature.

So the filter will now probably be completely blocked & need either cleaning (about 1 hours work) or replacing with an exchange filter. (half hours work & several hundred pounds for an exchange filter)

First of all does it have one I think not and that is not the problem don't get carried away.

If it has got one it has but according to the specs a 2.0hdi 120 does not have one 2.2hdi does but specs can always be wrong.But I hope it does and that is your problem solved you have suffered enough.

Andy, how can it not have one? Where does it say it doesn't have one?

I thought I had got the fault codes. The garage plugged their thing in and then rang Peugeot, and Peugeot said the empty Eolys plus the additive fault code points to the DPF.

I wish I hadn't bought it :-(

I am really glad you have at last sorted the problem out £700 ouch thats a lot of money I hope you have many years of trouble free running. You will be an expert on HDI engines now we will come to you for advice in the future.

Pleased that this is sorted for you now although I am a bit worried as you were that you had no alarm message.

I am thinking that the previous owner may have disconnected something to avoid the alarm message from appearing.

Did your garage find anything?

If that is the case then problems could return if the system doesn't try to regenerate the new filter as it becomes blocked.

I hope that I am just being pessimistic & you have many trouble free miles.

The filter needs changing & Eolys replenished at either the next 50k or 80k miles depending on the model year.