Diesel Particulate Filters
Diesel Particulate Filters (DPF)
Before you order your diesel vehicle you should know about Diesel Particulate Filters (DPF), which may or may not come fitted to your vehicle.
It is imperative that the warning light is not ignored and that the set procedure is followed and not interrupted to enable the correct regeneration of the DPF. Most vehicles require to be driven continuously for approximately 15-20 minutes at a speed of at least 45 mph in fourth or fifth gear (automatic transmissions, select sports mode), to maintain an engine speed of at least 2,000 rpm (refer to owner handbook).
If the conditions described are not met and the DPF warning light does not switch off, the level of soot in the DPF will continue to rise whereupon the DPF unit will eventually block
up completely and the vehicle will not be able to regenerate the DPF. If this situation occurs the DPF will need to be replaced.
If the DPF requires replacing and the manufacturer’s guidelines and recommendations have not been followed and adhered to, the cost of the replacement will not be covered by the manufacturer’s warranty and may well be charged to you.
If your vehicle has a DPF fitted, please consider the following:
- Continuous driving conditions in built up areas, inner-city centres and the Channel Islands do not provide optimum conditions for the regeneration process.
- Consider your regular driving style and length of your regular journeys to allow for the driving conditions required for DPF regeneration.
- If your normal driving conditions are any of the above, you must be prepared for the DPF warning light to illuminate on your vehicle. This will then involve having to drive the vehicle in the said environmental conditions (normally on the motorway) for a period of up to 20 minutes continuously.
- Please bear in mind that this process will have to be repeated regularly if the vehicle cannot dynamically regenerate the DPF during your normal driving.
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