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Cleaning the DPF (Diesel Particulate Filter)

Model: Renault Laguna MK 2, Laguna 2, X74 - Years 2001-2007
Part: Diesel particulate filter

If the DPF (Diesel Particulate Filter) is particularly clogged, to the point that normal regenerations are ineffective, you can opt for a forced regeneration, which is a sort of cleaning of the filter using a special kit that includes, in addition to additives, a specific compressed air gun that must be connected at the differential pressure sensor on the DPF itself. It is recommended to perform the operation in a well-ventilated area or, in any case, to connect the exhaust hose to a fume extraction system. Once the gun hose is connected in place of the differential pressure sensor, start the engine and maintain it at around 3,000 RPM; inject the cleaning additive with the gun until it is completely emptied: a white cloud will exit from the exhaust pipe. Finally, reset the fault memory of the engine management ECU using diagnostic equipment.

Updated on 8 February 2026 by ScegliAuto

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