Have you noticed a loss of power and poor fuel economy in your diesel vehicle? Or has your diesel had more frequent and lengthy regeneration cycles? This could be due to a soot overloaded diesel particulate filter.
Diesel exhaust flows through a diesel particulate filter (DPF), where soot and larger particles are captured, allowing only filtered exhaust gases to pass through. When the DPF soot level reaches a certain point, the engine's computer triggers regeneration (self-cleaning). During regeneration, exhaust temperatures must become hot enough to burn built-up soot off the DPF.