DPF re­gen­er­a­tion

Car Mechanics (UK) - - Help! -

Can you ex­plain how I can tell if my DPF fil­ter is re­gen­er­at­ing or not? My ve­hi­cle is a 2007 Peu­geot 407 HDI. Diane Carey

For the re­gen­er­a­tion process to take place, the en­gine must be up to work­ing tem­per­a­ture. Once this is achieved while driv­ing on ma­jor A-roads and mo­tor­ways, the process will take place without any driver in­put. If in­suf­fi­cient driv­ing at cruis­ing speeds is un­der­taken, the ve­hi­cle will in­di­cate that the DPF re­gen­er­a­tion needs to take place.

When the warn­ing light il­lu­mi­nates, the ve­hi­cle should, if pos­si­ble, be driven at a speed above 40mph un­til the light ex­tin­guishes, in­di­cat­ing the process is com­plete. If this ac­tion is not taken then the fil­ter may block be­yond the point where it can self-re­gen­er­ate and may need to be taken to a work­shop to com­plete the process.

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