Please help, I was accelerating slowly when I heard a 'clicking' sound. I dropped off the revs but as soon as started to accelerate again the clicking came back. I dropped off the revs again when there was a puff of white smoke and the engine stopped. I pulled over and tried to start the car, the engine turned over but did not start.

The breakdown driver fault coded and got the following:
P1631 Main relay malfunction
P1211 Injector Control pressure sensor above/below desired
P0251 Injector pump fuel metering control A malfunction

After clearing the faults and trying to restart the car, the following code came up:
P2291 Injector pressure too low

I have spoken to my college lecturers (I'm currently studying to be a Technician) but was wondering if anybody else has come across this fault and how they repaired it.

Please help as this is the only way I get to see my son.

The car is a 2001 Mondeo 2.0 TdCi 130

Tanks in advance