C3 2015 Hdi blue exhaust system

[Gambit]

On my car when underneath the other day, I noticed that there appears to be exhaust blow by on the joint between the bottom of the cat opposite the Adblue injector and the Flex hose part of exhaust.
I also noticed the next box along the pipe which is described in the citroen parts diagram as a particle filter has two small pipes attached to it described as particle filter pressure pipe.

Does any one know if there is a bit that can replace the burnt flange and be welded on instead of the expense of a new cat piece with the associated labour cost?

Can anyone enlighten me as to where the 2 small pipes go from the particle filter.

I am not aware that there is a DPF fluid bottle hidden away on this car , Its never to my knowledge had to be refilled in the time Ive had it from new or are there two types of DPF system on these cars.

thanks

[Huskyxantia]

The small 2 pipes will go to a pressure sensor some where on the side of the engine . Welding bits on to fix an exhaust isn't much good as it might flag up to an mot inspector that you have tampered with a system that's meant to protect the environment. Might be worth looking for a second hand part online and just swap it over.

Look opposite the fuel tank under the car you might see a black plastic box , if so your dpf fluid pouch might be inside it , or it might be a tank you can fill up

[Gambit]

Huskyxantia, thanks for your response.
you realy think ive got a tank of some sort and DPF fluid- ive had the car from new 10 years never seen any comment on service invoice so surely Id get a fault come up if it was empty, ive done my own servicing for the last five years and never seen or done anything?
I will go and look though and re check the hand book
Pete

[PaulC5]

How many miles miles has it done, if less than about 70k it may not think the DPF fluid level is low yet so no warnings would be given. It is not a routine service item to check the fluid level.

[Gambit]

Paul
The mileage is 82255 . The vehicle specific sheet telling you what to do when service wise says check at 61000 and then every 16000.
The Service light is on because of Adblue fault P20e8
I cant see anything tank wise so think I will ask the dealer parts lad who is quite good at answering questions.
Pete

[Gambit]

Hi all further greif!!

The MOT is due early August and will fail on the exhaust.

So looks like im going to have to change the cat converter.

Looking at it there are 2 sensors one at top and one near the bottom, both are wired to a single plug. can any one advise what they are called I cant be in a position where they wont come out of the old converter so will have spares on standby.
I think they are oxygen sensors pre and post cat.

Ive seen approved Euro6 replacments on EBay but cant work out if you need to change the heat shield over or if the body is double skinned so does not need it , all advice gratefully accepted.

Regards

Pete

[PaulC5]

Before you get too worried about the exhaust have a look at this topic on P20E8, it might need a new adblue tank. If this is not sorted it is likely to fail the MOT. viewtopic.php?t=80693

[Gambit]

Hi

All ready addressed that one last year, managed to find a new one on line I could afford and a small tucked in a corner of a engineering park garage who knew everything needed to re program after they had fitted it, have not had a peep out of it since.
The flange at the bottom of the CAT that connects to the flex has crack in it almost all the way round, gun gum wont stop it.

Pete

[RichardW]

Info about the exhaust system: viewtopic.php?t=81973

The sensors are temperature sensors. Should be possible to fabricate some sort of repair for the cat flange.

[PaulC5]

I am a bit confused, you say the service light is on due to P20e8 but then say this was fixed a year ago. Why then is the service light still on ?

[Huskyxantia]

Huskyxantia, thanks for your response.
you realy think ive got a tank of some sort and DPF fluid- ive had the car from new 10 years never seen any comment on service invoice so surely Id get a fault come up if it was empty, ive done my own servicing for the last five years and never seen or done anything?
I will go and look though and re check the hand book
Pete

The "Hidden" DPF Fluid Mystery: Eolys vs. AdBlue
​You are spot on with your suspicion—there actually are two different types of emissions fluid systems on modern Citroëns, and your car likely has both.
​System 1: AdBlue (DEF)
​This is what you are already familiar with because you can see the injector. It injects a urea/water mix directly into the SCR catalyst to break down harmful NO_x gases into nitrogen and water. You refill this yourself via a filler cap (usually next to the fuel cap or under the boot floor).
​System 2: Eolys Fluid (Patented DPF Additive)
​PSA (Citroën/Peugeot) pioneered a unique system that uses a built-in additive called Eolys (a cerium/iron oxide-based fluid) to aid DPF regeneration.
​Why you've never filled it: Unlike AdBlue, which is consumed rapidly, Eolys fluid is stored in a hidden pouch or rigid plastic tank located underneath the car, often tucked away near the fuel tank or behind a plastic undertray.
​How it works: Every single time you open the fuel flap and put diesel in, the car automatically injects a tiny, precise micro-dose of Eolys fluid into the fuel tank. This fluid chemically bonds with the soot particles, lowering their burning temperature from around 600°C down to about 450°C. This allows the DPF to clean itself much easier during normal driving.
​Lifespan: A full factory tank/pouch of Eolys fluid is designed to last anywhere from 70,000 to over 100,000 miles. Because you've owned it from new and haven't had to top it up, you simply haven't hit the mileage threshold where it runs out. When it does run dry, the car will display a specific dashboard warning stating "Particle filter additive level too low"—at which point a garage will need to replace the pouch/refill the tank and reset the counter using a diagnostic tool.

[Gambit]

Paul the ref to the service light on was a year ago, that was delt with back then