Ash accumulation is a side effect of DPF filtration and regeneration. It is caused by the extended use of incombustible materials like lubricant additives, trace elements in diesel fuel/additives, as well as debris from engine wear and corrosion. Ash typically accumulates along the DPF walls or in plugs near the rear of the filtration element. Check the engine oil for diesel contamination (could be the result of regeneration) The fuel additive, Eolys, level is too low. In order to carry out a forced DPF regeneration, the correct diagnostic or reset tool must be used. This operation could take up to 30 minutes. Ensure the regeneration process is conducted in a safe environment as Its a 60 plate GP C4 1.6 HDI VTR+ (tarted up version), if that's of any use. Defo has a DPF - all diesel uk C4 Picasso's have them. Your driving pattern indicates a petrol engine is more suitable. You reaslly need a joiurney much onger than 8 miles to get the system reallyh hot.
C4 Grand Picasso dpf issues. I have a 2014 Citroen c4 grand Picasso exclusive 2l diesel. The adblue warning light kept coming on and saying that there was no adblue when it was full and that it would stop in 600 miles and I ended up having the adblue tank replaced about 2 months ago under a warranty. Now I have the engine light and the dpf

EOLYS fluid is a fuel additive and is added to the diesel in the fuel tank by the EOLYS pump when needed to make the fuel and air burn in the engine run hotter, regeneration of the DPF requires exhaust gas temperatures of 600 degrees to burn the soot from the DPF.

The Eolys liquid pouch does eventually require replacement as original Xsara Picasso owners know all too well. I never experienced this problem myself on one of my previous cars, a 3.0D Jaguar XF, but other forum members were getting orange DPF warning lights, requiring an 'Italian tune-up' when they didn't do enough miles to complete the DPF . 386 360 0 138 170 334 359 384 258

citroen c4 grand picasso dpf regeneration