2023 Version ANCEL HD120 Bluetooth All System Heavy Duty Truck Scanner, Diesel Truck Diagnostic Scan Tool 9 Pin and 16 Pin DPF Regen Compatible With Volvo, International. DPF Regeneration is used to clear PM (Particulate Matter) from the DPF filter through continuous combustion oxidation mode (such us high temperature heating conbustion, fuel additive or catalyst reduce PM ignition conbustion) to stabilize the filter perfornance.