Press and hold the regeneration button for a few seconds, until the regen warning light goes off and the regen process light starts to blink. Wait for the process to finish, about 30 to 40 minutes. During the regen process, the engine will idle higher as the RPMs are increased, and there will be a burning smell as particulates are incinerated. Driving at a speed greater than 40mph for more than 10 minutes should ensure your DPF goes into 'regeneration' mode and clears the blockage. If the warning light fails to go out, you need to take your car to a dealer as soon as possible, where they may use a special DPF cleaner or send it away for specialist cleaning. Active regeneration and parked regeneration both take approximately 45 minutes to complete. Again, it depends on what temperature degree your DPF filter needs to reach to burn off the soot. Trucks equipped with a fuel-borne catalyst take less time and consume less fuel. On average, a truck without a fuel born catalyst takes 1112 degrees Diesel Particulate Filter (DPF) Regeneration. If you mainly do 30km a day of city driving (avg 30-40 km/h), how often a week do you need to do the DPF Regeneration cycles ? How long does a normal Regeneration cycle take? - i.e. How long on the freeway do you need to drive for 1 cycle? Thanks The company's DPF is built to last and has been around for over 80 years. In order to regenerate a DPF in a truck, you should use a diagnostic scanner. These tools enable you to erase fault codes and graph live data. They work on all Peterbilt trucks, and you can use them for everything from forced DPF regeneration to oil light resets. On my euro 4 engined Mazda 6, it failed to regenerate the dpf due to the design/software. It wasn't just Mazda where it failed but also with other manufacturers as well. It absolutely ruined the car and prompted many owners to have the dpf gutted in order to save the owners £100's in garage forced regenerations and unnecessary oil changes Diesel Particulate Filter Question. I’ve got a 2020 RAM 2500 with the 6.7 Cummins. This is my first diesel engine so still learning about all the engine parts. One item I have a question about is the DPF, I’ve got 23,000 miles on my truck and the DPF gauge has never moved. It still reads zero. Score: 4.4/5 (30 votes) A Parked Regeneration will stop if the key is turned to the off position, the truck is put into gear or the parking brake is released. The regeneration will take approximately 20-40 min. The regeneration is complete when the engine returns to low idle and the DPF lamp remains off. 2C5d.