The later 2.0 HDI engines, like the RHH, use suction to lift the fuel. The tank unit has the strainer and gauge sender. Looking for water is a trivial exercise - put a glass jar under the transparent drain tube, open the bleed screw at the filter housing bottom, and loosen the air bleed screw on top. Citroen C4 DPF blocked with ash and soot.The additive system is also known for blocking the filters as well.www.dpfrepair.co.uk08000614817 I have the particulate filter warning come on about 10 minutes after I hit 100k (also on a 300 mile drive)local garage has put on diagnostic and everything seems ok inc dpf fluid. Cleared the code and it lasted about 30 mins before coming on again, every time I put my foot down. BM31032H Exhaust Diesel Particulate Filter. This exhaust part is guaranteed for 2 years and is available C4 Grand Picasso: 2014: Diesel MPV: 1.6 BlueHDi 120: FWD Warning! Shut down the engine before starting any work – CITROËN C4 Picasso I (UD_) The vehicle must be on even keel, and if it is at an angle, the drain plug must be at the lowest point. Replacement: engine oil and filter – CITROËN C4 Picasso I (UD_). Tip from AUTODOC: AUTODOC recommends: Soot and other particles from diesel engines worsen the particulate matter pollution in the air and are harmful to health. New particulate filters can capture from 30% to greater than 95% of the harmful soot. With an optimal diesel particulate filter (DPF), soot emissions may be decreased to 0.001 g/km or less. Hi, I'm a C4 Picasso 1.6HDi owner fm Durban, South Africa. Just had turbo replaced for the 2nd time about 3 weeks ago. Now done 105k (km) but started losing power a few days ago. It has been an undeniable success over the years, with production running until 2017. A family car, the Citroën C3 Picasso offers its occupants a comfortable interior, flexible space and appreciable soundproofing. A vehicle that loses power and frequently stalls is most likely suffering from a diesel particulate filter problem. The solution ? FWoWLa.