corsa c cdti sxi 1248 cc, cut out and wont start?

i was driving along a main road when my car cut out, the service light came on, now the car wont start, i have changed the egr valve, the crankshaft sensor, the airflow filter, but still wont go. i had it on a diagnostic machine and it says its fuel related. has any body had the same problem if so how did you fix it. thanks