If the DPF warning light is flashing along with the red shut-down lamp, what does Technician A suggest? Why does Technician B disagree?

When the Diesel Particulate Filter (DPF) warning light is flashing alongside the red shut-down lamp, it indicates that the DPF is reaching a critical state where it can't properly filter particulates, potentially leading to significant engine issues. The flashing warning signals that the filter needs immediate attention, typically in the form of active regeneration to burn off the accumulated soot.

Technician A's suggestion to replace the DPF because it requires active regeneration could be seen as a misunderstanding of the process. Normally, active regeneration is a method to clean the filter without replacing it. The technician might be indicating that the DPF is beyond regeneration, but a proper assessment usually determines if a DPF can still undergo regeneration before considering replacement.

Technician B's disagreement might stem from the understanding that replacing the DPF outright would be premature if the filter can still be effectively regenerated. A thorough evaluation of the DPF's condition is required to assess whether active regeneration is a viable option for restoring the functionality of the filter before considering a replacement.