hi folks. got into my car this morning and ended up with a low oil pressure warning. was extremely cold (-13 according to dis). only got warning when i'd been letting it turnover for a bit longer than usual and it only came up the once. ended up leaving the car as the beggar wouldn't start. gonna change plugs and see if that sorts the non starting. anybody any ideas what caused the warning? was hoping it was just the extreme cold but knowing my luck! it's a 2004 2.0 tdi sport bkd engine. thanks.