What is the correct service procedure when the DPF warning light is flashing?

When the Diesel Particulate Filter (DPF) warning light is flashing, it indicates that the DPF has become clogged, and the exhaust gas cleaning system is not functioning as intended. Performing a manual regeneration is necessary because it actively burns off the accumulated soot in the DPF, allowing it to function correctly again.

During manual regeneration, the engine management system raises the exhaust temperature to a level that effectively incinerates the trapped particulate matter. This process restores the DPF to an operational state, allowing for proper exhaust flow and compliance with emissions regulations.

The other options, while seemingly related to DPF maintenance, do not directly address the immediate issue indicated by the flashing warning light. For instance, removing the DPF for cleaning may not be necessary if a successful manual regeneration can resolve the problem. Replenishing the urea reservoir is important for the SCR (Selective Catalytic Reduction) system, but it does not directly affect the DPF issue. Running the engine at high idle can help in some situations, but it does not guarantee the controlled conditions necessary for effective regeneration.

Thus, the correct service procedure in response to a flashing DPF warning light is to perform a manual regeneration, ensuring that the DPF is cleared of soot effectively and returned