Johndouglas Posted February 5, 2013 Posted February 5, 2013 Easiest way is to look underneath the car. Where the exhaust pipe comes down from the back of the engine, if you have a particle filter you'll see two boxes bolted together and jointed into the exhaust system. The first box is the particle filter and the second is the cat. Quote
paul.h Posted February 5, 2013 Posted February 5, 2013 You need to provide more of the VIN numbers for a check on the Citroen service documentation, a guess at the last 5 numbers is not showing a recognised car and if it did may not be your specific model. Or provide the model year/engine size/bhp or as above have a look at the exhaust down pipe.If it was a C5, RC RHRH would be a 2 litre HDI 138 bhp with particle filter and RC RHRG the same but without a particle filter - according to the French RTA manual for the mark 2 C5 from 9/2004 . Quote
watercooled Posted February 6, 2013 Author Posted February 6, 2013 yes its a c4 2.0 hdi RHRH and does have the filter.so i guess i need to give it a good run now and again. i was going to fit an led in the wing mirror to let me know when its regenerating but i don't have heated mirrors :( Quote
paul.h Posted February 6, 2013 Posted February 6, 2013 If you have a look on the C5 subforum, there is a lot of info on removing these particle filters when they come up for replacement about 75k miles. There is also a C4 forum that has many posts which likely will be of help - C4owners.org Quote
watercooled Posted February 6, 2013 Author Posted February 6, 2013 (edited) my car is on 117000 miles, i wonder if the fluid has every been refilled. i may get the car in for a interim service at citroen. Edited February 6, 2013 by watercooled Quote
paul.h Posted February 7, 2013 Posted February 7, 2013 Your service book will give the mileage for replacement and should note if it has been done - if done at a Citroen dealer it would be on their computer records. The book (dated 09/06) with our C5 gives the service schedule for the C4 2.0 hdi as top up eolys fluid at 80k miles, replace particle filter at 120k miles. So it probably has 40k miles to the next top up but is due for the filter replacement. Cost may be around £400 so other people on the C5 subforum have had the system removed - drill a hole through the core of the filter and modify the software to remove the eolys fluid - then some drain and sell the fluid. The reports are the cars still pass the MOT, maybe improved mpg and performance. Quote
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