The Diesel Particulate Filter (DPF) is designed to filter and contain as much of the carbon particles as possible until the regeneration process begins. It reduces the soot to carbon dioxide and water particles. Some manufacturers inject fuel into the DPF, which will facilitate a temperature rise to approximately 1200° F. This process will convert the soot into harmless ash that will be expelled through the exhaust.
When the Powertrain Control Module (PCM) detects excessive soot accumulation in the DPF, the DTC P2463 OBDII code will be stored, and the Malfunction Indicator Lamp (MIL) will turn on.