Hi, sorry for the late reply I have been busy with work, as for it dying on you this can happen to any car so I wouldn't take it personally I had it a couple of times with my Fords one of which cut out at 80mph on the M25 with passengers on board I could almost hear the rosary beads being counted as managed to shimmy the car across three lanes of traffic and get to the hard shoulder, it turns out the water pump was soaking the crank position sensor with red hot coolant, I was a bit P.O. as the pump had only done 15k.
Anyway got it fixed and we did the next 80k with no problems, unfortunately its a fact of life that most vehicles over 100k will have some sort of problem and I am sure if fixed it will still be a usable vehicle for years to come, BTW I can't work out how he managed to get a fault code for the injectors unless they were already there before it stopped working. Clean the system replace the two injectors and the pumps and as long as the mechanic is thorough it should be fine.
Steve.