Diesel Particulate Filter

The DPF or Diesel Particulate Filter is a feature found on Internationals which may cause a dashboard warning light of the same name.

The DPF serves to collect uncombusted diesel fuel molecules and burn them at an extremely high temperature, converting them into less harmful CO2.However, the bus must be running under certain conditions in order to accomplish this. If the bus cannot achieve these conditions and the DPF goes for too long without being cleaned, the engine can suffer serious performance issues.

Depending on the DPF status, the DPF light may activate on the dashboard. The DPF light can generally be ignored, unless it is flashing and/or accompanied by an audible warning. If the light exhibits either of these symptoms, call base and ask for instructions on how to perform a Parked Regen. This should clear the DPF and return the bus to functionality.

On the Internationals, the DPF light and HEST light are generally concurrent, since the DPF cleaning process produces a high exhaust temperature as a side effect.