Doors locking by themselfs ?

[Blue]

Hi all, ive got a 406 hdi 2002 saloon, my problem is i was driving to local shops and central locking activivated a couple of times and both indicator arrows on dash board light at same time carried on driving and it stopped by it self got home locked car then went out again later and happened again anyone had this or no of any solutionsor why its happening, many thanks
Dave.

[gumby6371]

I'd try the key fob itself as a first port of call, change the batteries and check the button is in good condition.
My D8 had a bodged button on the key fob that was so sensitive I couldn't put the key in my pockket until I was out of range of the car or it would unlock as I walked away. Bought a new button off the bay and all sorted.