its get the comunication, if you cant then its may be the engine ecm or the wirring on the vechicle, try it and then make us know what happen

 Tried with VIN number? You need the right manufacture year. This may fool you whilst the nr. on the car papers does not say which model year you have. Especially with french cars this does do a lot for the correct ECU reading and with this the options you get available.

Peugeot however is not that easy to read ever, older ones worse then newer editions.