l am going to buy this car took it for test drive and it conked out lots ov times on my yourney but starts again no prob can any body tell me why the man at the garrage says it will be a sensor is this true.

l assume as the garage said it was a fault & not ur driving (as when driving a different car u can be prone to stalling it if the clutch is heavy & you're used to a light one). l wouldnt buy the car unless the problem is solved, if the garage thinks its just a sensor & not going to cost much then the garage should fix it in the interest of selling it (as cars that stop working dont tend to sell too well), so u could say to them that u will buy the car if they fix that problem, if they refuse & you're still really keen on the car u could pay for an inspection by someone like the AA or RAC who will check the whole car & should be able to identify the problem & possibly an idea of repair costs

If the garage can not sort-out the problem.
..what chance have you got?