Diesel particulate filter burning?

Faults and Technical chat for the Citroen Aircross
Post Reply
-VJ-
Posts: 10
Joined: Sun May 12, 2019 6:02 pm
Location: Tornio, Finland

Diesel particulate filter burning?

Post by -VJ- » Wed Sep 11, 2019 9:17 pm

How do you know when diesel exhaust filter is regenerating?

Today I drove very short periodical driving (from letterbox to another) drivers window open. Suddenly I noticed loud low frequency rumbling from exhaust tube, I thought that I have silencer break. Also start-stop doesn’t activate. Loud noise and continuous idling when stop lasts less than 10 minutes. Maybe car was regenerating it’s carbon filter? C3 Aircross HDI 100.

In my older C5 only sign of filter regeneration is the smell of burning rubber.
C3 Aircross Shine 1,5 BlueHDI 100 "Pull me over red", Tornio, Finland


routemaster1
Posts: 38
Joined: Wed Mar 27, 2019 7:57 pm

Re: Diesel particulate filter burning?

Post by routemaster1 » Fri Sep 13, 2019 5:55 pm

You can tell if the instantaneous fuel consumption figure has got substantially worse. You are unlikely to be able to smell a regen after the first few regens. There was a post on the C4 site several years ago where they had added a LED telltale near the driver's mirror.


preventlow
Posts: 4
Joined: Sun Aug 04, 2019 2:10 pm
Location: Copenhagen, Denmark

Re: Diesel particulate filter burning?

Post by preventlow » Fri Sep 13, 2019 6:28 pm

I have a c3a 100 Hdi as well, and the first few times it regenerated it freaked me out, because it sounded like the exhaust system suddenly had holes in it. I've used the Torque- and later FAP Citroen/Peugeot app to confirm that the noise comes from regeneration. And after 34000 km, it still makes the noise.
C3 Aircross Skyline 1.5 Blue HDI 100, Spicy Orange - near Copenhagen, Denmark


-VJ-
Posts: 10
Joined: Sun May 12, 2019 6:02 pm
Location: Tornio, Finland

Re: Diesel particulate filter burning?

Post by -VJ- » Sun Sep 15, 2019 7:50 am

I don't understand why they didn't install any advice light for filter regeneration? When it is on it would be often easy to drive a couple of kilometres more to get it off.

At work I drive MB Sprinter citybus. Only in the city area maximum speed 50 km/h, mostly 30 to 40 km/h. Diesel filter blocking is a real issue. Our serviceman introduced system that we start filter regeneration with Diagbox software and drive 50 km on the highway at full throttle. The bus is limited to 100 km/h but with this procedure the filter opens.
C3 Aircross Shine 1,5 BlueHDI 100 "Pull me over red", Tornio, Finland


preventlow
Posts: 4
Joined: Sun Aug 04, 2019 2:10 pm
Location: Copenhagen, Denmark

Re: Diesel particulate filter burning?

Post by preventlow » Sun Sep 15, 2019 7:33 pm

I assume the reason for the lack of info lights during regeneration is a sort of "no news is good news", meaning you should (engine wise) only be adviced by a light if something is wrong. And the car actually turn on a light if the filter is getting close to clogged because the regeneration repeatedly is being stopped by the driver. That said, during the 600000+ km I've driven in my old Xsara and regular C3 HDi, I never noticed the regeneration process. In the C3 Aircross, however, even my passengers notice.
C3 Aircross Skyline 1.5 Blue HDI 100, Spicy Orange - near Copenhagen, Denmark


Post Reply

Return to “Faults & Technical”