By popular demand a lot of 8th Generation owners have not received the guidance on how to use the DPF equipped cars nor been handed the customer leaflet at the time of delivery. To make it easy for all Diesel 8th Generation owners please find the user guide and print it off for future reference. Hope this guide by Honda puts people at ease in what to do when you see the DPF light. Thanks goes to Honda for this brilliant guide. WHAT IS A DIESEL PARTICULATE FILTER? In simple terms the Diesel Particulate Filter (DPF) is part of the exhaust system responsible for collecting the engine exhaust particulates before they enter the atmosphere. WHY HAVE A DPF? The DPF filters the exhaust smoke and black soot is reduced. The result is a cleaner environment and less pollution entering the atmosphere. HOW DOES THE DPF WORK? In addition to converting the harmful exhaust gases, as in a conventional catalytic converter, the DPF also catches soot particles emitted in the exhaust gas. The DPF continues to collect soot particles until a predetermined level is reached. At this point the DPF will clean itself through a process known as DPF Regeneration. This process increases the temperature within the DPF and burns off the soot particles. HOW WILL THE DPF AFFECT ME? In order to carry out the regeneration process the DPF needs to reach and maintain an exhaust temperature higher than its normal. Under most conditions the vehicle is able to carry out the regeneration procedure unaided. However, in some circumstances where the required temperature cannot be achieved, i.e. frequent short journeys or stop/start driving, the vehicle may fail to regenerate the DPF. WHAT SHOULD I DO IF THE DPF WARNING COMES ON? When the warning shown illuminates, it does not mean there is a fault on the vehicle. It means the vehicle needs help to carry out DPF regeneration. The procedure involves the vehicle being driven in a certain way to help increase the exhaust temperature. Drive continuously at a speed of at least 40 MPH until the warning extinguishes. . This may take 15 minutes or more. If the conditions described are not met and the DPF warning will not extinguish, the level of soot in the DPF will continue to increase. WHAT HAPPENS IF THE WARNING COMES ON PERMANENTLY If the lamp comes on permanently or the multi info display displays “Check System” the DPF regeneration can only be carried out at a Honda dealer. It is recommended that the vehicle be driven straight to a Honda dealer. Failure to adhere to this recommendation may result in reduced engine power followed by the DPF becoming blocked. If the DPF is blocked to the point where it is not possible to perform the regeneration process, the DPF will need to be replaced. If the vehicle is filled with Petrol in error or modifications are carried out to the engine this may damage the DPF system. (Be aware that the repair work is not covered by warranty in these areas.) If you require any further details on the use or operation of the DPF system please contact your nearest Honda dealer.