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These are the main issues we’ve seen time-and-again when attempting to assist customers with the deadly “DEF” problem on their Sprinters. My last three “DEF” problems (all on Sprinters) were resolved with a DPF/DOC cleaning AND an ECM software flash (update). Seems there’s a whole host of...

This simply means that your DPF needs cleaning. “Diesel particulate filter differential too high” means that the pressure sensors before and after the DPF are reading a BACKPRESSURE that indicates that the volume of soot and ash within the DPF is nearing the upper limit and thus diminishing...