I have a C3 SX 1.4 petrol, same problem with the engine cutting out. this have happened about five times, done 3.000 miles from new. its very dangerous, I had the engine cut out when turning right, stopped across road. theres other things wrong with car, squeaky brakes, squeaky back spring, wine in gearbox (5th gear), steering got stiffer, rattles coming from everywhere inside, trim keeps falling off, Citroens are junk.