Diesel Particulate Filter (DPF)

The DPF – or soot trap – “filters” harmful diesel exhaust soot particles that should be emptied
regularly (regenerated) to maintain performance and the life of the filter. The DPF needs to be
cleaned regularly, through a process called regeneration (active, passive or forced regeneration).
Regeneration burns off soot at a temperature of 1100 F to leave only a small residue of ash,
effectively renewing or regenerating the filter, making it ready to take on more pollution from the
engine. When a normal regeneration is no longer effective, maintenance will be required.