The C5 says anti-pollution fault every now and again, usually for no reason. 2003 Citroen C8 2.2Hdi Exclusive Captains Chair 2007 Renault Megane 1.6VVT Cabriolet She just arrived home from Donegal (a 120 mile journey she does once a month to see her mother) and said that towards the end of her journey the car warned that the Depollution System is faulty. The car is a 2005 Citroen C4 Coupé 1.6 HDi VTR+ with 50,000 miles. From my limited knowledge I know that this is a fairly common message for HDi I have previously had the anti-pollution fault where the car goes into limp mode and I have managed to clear this by going on the motorway for several miles at 70mph in a low gear. The worst came yesterday when at a roundabout a warning came on the screen regarding the oil pressure and the car died. If so then possibly the dpf needs cleaning or replacing. You could try running the engine at about 3000 rpm for a while to regenerate the dpf or remove it and try water jetting it to remove the ash. On here the fault code definitions are: P1447 ELC System Closure Valve Flow Fault. Citroen C5:ssa samaa vikaa. antipollution fault tulee näyttöön ja kun koodit lukee, niin logi sanoo secondary air injection system syyksi. mutta on kuitenkin jännää, että kun vika on päällä auto toimii paremmin, sekä kylmänä että lämpimänä, mutta kun vikavalot ei pala auto nykii ja yskii välillä. Anti Pollution Fault could mean any one of a hundred things. You need to get the ECU fault codes read first of all. If it's a diesel you could try driving it on the motorway with the revs up (4th gear would get the revs up) and see if it clears. butterworth Posts: 17,843. Forum Member. The "anti-pollution" fault message is a generic one that covers virtually any fault with the engine electronics. It just means that the ECU has detected a problem and set a fault-code in the memory. If the voltage of the whole car falls, then it displays "economy mode" and all non-essential electrics die. C5 EXCLUSIVE SE HPI - Anti Pollution Fault. Hi, I have a well looked after C5 from new with about 30k on the clock. I now have the obligatory 'Anti Pollution Fault' and have had it in 2 garages. The most recent replaced the fuel pressure sensor (part 1920CJ). The car still has the same fault but I have been taking it out on short journeys (2 wuBaGPX.

citroen c5 anti pollution fault reset