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C4 B7 1.6 HDI 2016 Exhaust gas pressure differential.

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Mudshark   
Tue May 09 2023, 03:09pm
Member No: #57787
Joined: Mar 05 2021
Location: Norfolk
Can any one tell me how this is measured on these as there are no pressure take off points on the dpf/cat unit. I believe there is a fault in system as I keep getting blocked filter warning after cleaning three times.
Farmerguy   
Tue May 09 2023, 03:58pm
Member No: #59597
Joined: Apr 10 2022
Location: Denmark west part
There is on mine two tubes where it measure the pressure, you must have this too, i dont know it that year uses the eolyse fluid, which sticks to the dpf and i am under the impression it cant be cleaned and must be replaced. On mine it must be replaced every 180000 km
1 User said Thank You to Farmerguy for this Post :
 Mudshark (10 May 2023 : 01:40)
Mudshark   
Wed May 10 2023, 01:50am
Member No: #57787
Joined: Mar 05 2021
Location: Norfolk
Thanks Martin I have not got the eolyse fluid fitted and I have had the cat/dpf unit off and there is only two temp sensors fitted to the unit. Milage is about 50k when i put the diagbox on the differential just keeps going up when engine is running.I will take undertray off again to see if I missed anything.
skorpion   
Wed May 10 2023, 02:57am
Member No: #55124
Joined: Nov 28 2019
Location: West Yorkshire
I thought all Citroen Diesel cars built after 2009 had the eolys additive system fitted, to comply with exhaust emission reg's.
routemaster1   
Thu May 11 2023, 04:01am
Member No: #574
Joined: Jul 08 2007
Location: Dorset
skorpion wrote ...

I thought all Citroen Diesel cars built after 2009 had the eolys additive system fitted, to comply with exhaust emission reg's.


Certainly all C4 Picassos since 2006-2007 had DPFs and EOLYS. Don't know about the others.

Farmerguy   
Sat May 13 2023, 12:53am
Member No: #59597
Joined: Apr 10 2022
Location: Denmark west part
Mine is a 2010, it has the eolyse.
The eolyse was not to meet regulation, but made it possible to regen the dpf at a lower temp than normal and then make a better system.
Try use the autodoc app, then type in your car and see what the dpf pressure sensor look like and try to find it in the car, or look down the exhaust, it must have a sensor for measuring pressure diff on the dpf system
 

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