For the benefit of others: 1) Clear faults for engine. 2) Change to EOL service mode. 3) Login with code 27971. 4) Basic Settings > Service DPF Regeneration (cant remember the exact wording) 5) Long press the green button (it will say it exited due to safety) 6) Turn off engine (ignition still on) 7) Turn on engine. Does your diesel engine drivetrain include a diesel particulate filter (DPF)? Here are some things you should know about the regeneration cycle, including ho The thermostat: When the thermostat breaks, the engine cannot reach the optimal temperature needed for the activation of DPF regeneration. The lambda sensor is part of the emissions system. Its damage directly affects the results of regeneration. DPF sensors: The diesel particulate filter consists of various sensors that track its performance. How does it work? DPF’s or ‘traps’ simply do that, they catch particles of soot in the exhaust. As with any filter, they must be emptied to allow them to maintain performance. The process of cleaning the filter is known as ‘regeneration’. How long does a DPF last? DPF’s are designed to last in excess of 100 000 miles. DPF occurs. This type of regeneration is referred to as passive regeneration since it occurs naturally without requiring any kind of interference from the Emissions Control System (ECS). In practise however, the exhaust gas temperature is too low to sustain regeneration of the DPF under all operating conditions. DPF Regeneration Check the current state of the diesel particulate filter in your car and request a regeneration if required. Only for cars with diesel engine and diesel particulate filter. How does a DPF work? A DPF works by trapping soot as it passes through the exhaust system to stop it from being released into the atmosphere. As with all filters, the Diesel particulate filter needs to be cleaned regularly, this is achieved through a process called regeneration. Cordierite Diesel Particulate Filter on GM 7.8 Isuzu. Unlike a catalytic converter which is a flow-through device, a DPF retains bigger exhaust gas particles by forcing the gas to flow through the filter; however, the DPF does not retain small particles. Maintenance-free DPFs oxidise or burn larger particles until they are small enough to pass 1ikPaoT.