Hi,

The PRND warning is telling you that there may be a problem with the gearbox. It may be the gearbox or it may be the ECU incorrectly telling you that there is a problem with the gearbox.

Take it to a dealer or a mechanic who knows Peugeot who can check it out and advise you what the real problem is. Then you will have a better idea of what is going on and what you need to do..