About 200 miles ago I had a problem starting the car one evening after it had been sat about 20 mins, went to start the car I which starts straight away and cuts out as soon as it idles (Rev counter was going to 900ish then off). Along with a flashing glow plug light, tried it 3 or 4 more times, on the last time I pressed the accelerator to keep the revs up and it worked, didnt stall and has been fine for over 200 miles.

I won a F Super 2 Diagnostics kit off ebay for a tenner and read the codes, as the systems I have wont read my car, because its a pre 2002 ECU.

So i got 3 codes off the F super shite. (Which didnt seem to clear codes and managed to 'lose' the fuel pump and it wouldnt start, which is sorted now)

P0409 (EGR Related to sensors but the EGR is Unplugged so these are irrelivant) along with P0404.

I also got P0167 o2 Heater Sensor Circuit Malfuction Bank 2 Sensor 3.
Which Im guessing the car has Heated Lambda Sensors, one of which has failed? But it runs spot on and doesnt give any EML light or Flashing Glow plug?

Would a bad o2 sensor lead to not starting? Or is that probably just a funny 'moment' it had, as I would of expected it to do another 'moment' sooner, sat on the motorway the other day for about 20 miles pulled like a train, really impressed for somthing with 200K on the clock.

Another note is about 3 days after it wouldnt start it was remapped? I got P0262 from the cluster as a fault code which is Injector 1 High voltage, I have read that on Focus RS MK1s and Focus TDCI after a remap people have seen this code and its just gone away?