DPF Regeneration

📖 YOUCANIC Automotive Glossary

DPF regeneration incinerates accumulated soot by raising exhaust temperatures. Three types: passive (occurs naturally during highway driving at 350-500C), active (ECU-initiated when soot reaches ~40-45% by post-injecting fuel to raise temps to 550-650C), and forced/service (scanner-commanded when active regen has repeatedly failed and soot exceeds 70-80%).

Failed regeneration is the primary DPF problem cause. Short trips prevent the 20-30 minute high-temperature period needed. Interrupted regeneration allows soot to keep accumulating until limp mode. The YOUCANIC UCAN-II monitors regeneration in real time — pre/post DPF temperatures, soot loading, regen status, and history. If active regen keeps failing, investigate fuel quality, exhaust temp sensors, DPF differential pressure sensor, or turbo issues.