It seems to me that the problems are unrelated. On several times, the DPF light has came on. However, after a bit of driving at 2500 rpm, it generally goes off. The EML has also come on a couple of times, necessitating visits to the neighbourhood repair shop. Not a single one of these occurrences has affected starting, and it continues to drive normally with either light turned on. I recall returning home from Stonehenge to Hertfordshire one day while both headlights were illuminated, and the vehicle operated as smoothly as though neither light had been turned on. I took it to my neighbourhood garage the next morning for a forced regeneration, and it began right away. About three years ago; I've owned the vehicle for seven.