speedo and doors on clio 2006?

Hi everyone i have a 2006 clio 1.2 16 v and there is a problem the speedo seems to be faulty it works then stops then works again also if you lock the car with the remote the doors make the click sound but does not lock everytime.If you resets the computer by swiching the car off pressing the kilometer reset buttun and swiching the car on everething including the speedo works fine for a wayle