renault sceinic 2002 1.9 dci engine cuts out?

i have a renault 2002 sceinic dci when accelerating engine cuts out and engine dashboard stop light comes on ,car has been pluged in to diagnoses and comes up with faults 311 missfire to cylinder and 104 air intake sensor took to very good auto elec hes scratching his head with this fault has anybody had the same symptoms please help................