Anti pollution fault can mean many things get it diagnosed with a EML fault finder this fault turned out to be a camshaft solenoid there are 2 on this engine citroen c4 grand picasso - citroen fault - Collos25. You need to take it to a Citroen agent who will either clean the DPF and refill the Eoly tank (if its got one) or fit a new DPF and refill the Eoly tank then turn the warning light off and charge you the earth.If you are technically handy you can change the DPF buy the Eoly oil of Ebay and 1 Answer. SOURCE: citroen c-crosser anti pollution warning light. We had this with our grand picasso all the warning lights on then car went into limp mode replaced two lambda sensor as this is what citroen thought it was in the end coolant sensor was leaking up wire back to ecu making all kinds of lights come on as it malfunctioned in the end Re: Citroen fault codes ako se radi o c4 2.0 hdi tada taj auto možda ni nema P1429 grešku koju prikazuje. tvojim prijašnjim postovima vidim kako si kupio auto sa greškom aditiva, i bilo je prilikom kupnje neke igre oko aditiva. vjerojatno vučeš greške neko vrijeme i sve skupa je poblesavilo. SOURCE: How to reset immobiliser on a Citroen c4 1.6 petrol 2005 disconnect the battery join the leads together this works for me in the long term airport parking ,if it doesnt then call a auto locksmith or the dealer as you need the four figure number that came with the vehicle new to be able to re-programme it ,and often this is removed by the dealer when the vehicle is new to stop people Peugeot 307 (2001 - 2007) - 03 110, Anti Pollution System Fault light.. Hey Guys. This is my first post on here. here goes. I have a 03 reg 307 hdi 110 bhp. It was serviced 10000 miles ago at a local garage, However for about 2 weeks it has started to become sluggish (really sluggish..) there is literally no power, until the turbo kicks in, and woosh away i go. Hi my Citroen C4 Grand Picasso 1.6 HDI Automatic has started to become unreliable (104,000 Km). Last week for no known reason the engine cut out whilst I was driving along at about 75 km/hr. The "anti-Pollution" fault light came on when this happened and stayed on. I restarted the car and drove home. Automobile CITROËN Grand C4 Picasso Owner's Handbook Manual. (352 pages) Automobile CITROEN C4 Owner's Handbook Manual. (340 pages) Automobile CITROEN C4 Handbook. (292 pages) Automobile CITROËN C4 Owner's Manual. C4 citroën (256 pages) Automobile CITROËN C4 Owner's Handbook Manual. xNNuH7s.