1997 Volvo S70 car just died on me

Hi looking for some help I have a volvo s70 2.5 tdi which I thought was running ok started car this morning it was minus 6 outside gave it a few heats and started no probs I left engine ticking over for fifteen mins till was thawed out then drove the car for around a mile and it just died on me with an engine light coming on think the light was no 21 to do with fuel or emissions I took off fuel filter and drained thinking maybe water causing and the very cold weather we having latelyhad to get towed back home I have noticed the last few mornings there has been o lot of black smoke coming from exaust but once warmed up has been fine any help or suggestions would be great many thanks joe