Why does the service light and airbag light come on on my Renault clio?

This is a common fault with my clio, happens on mine regularly, if you don't think its anything serious, it is likely to be the wiring under the passengers seat coming loose. If my passenger seat is slid forwards/back too fast it can slightly tug the wiring, loosening it and putting the lights on.. annoying i know... just take a look and make sure all the wires are all the way in the sockets and the light should go off.