While the engine is warm, set the parking brake and put the transmission in neutral. After that, open the cover plate on the tank compartment and locate the SCR cleaning operation switch. Move the switch to the left to start the refresh process. From there the process will occur automatically, taking approximately 35 minutes.
The feedback sensors on or near the DPF help the vehicle’s computer monitor its functionality. If there are irregularities in the pressure limits for two running cycles, the P2002 code appears. After successful regeneration, the P2002 will clear. Diesel Particulate Filter Regeneration. DPF regeneration usually happens automatically.
The "Regen" button on the dashboard must be pressed for two seconds while the engine is running. Various models have slightly different dashes and systems. Always make safety a priority when regenerating your Volvo. The active regen process takes approximately 20 minutes, but can take as long as 60 minutes depending on your driving habits.How Long Does The DPF Cleaner Take To Work? Generally, DPF cleaners begin to work pretty much straight away after being application. Research has shown that vehicles can start to show improved performance as little after 10-15 minutes after the DPF cleaner has been applied.