1999 Ford Windstar speedometer

i just ahd a question i have taken my van to the shop twice this week and was told my sensor had to be replaced so i ahd both snesors for my van replaced and know my speedometer when im driving it is saying im going 140 when im really going 60 so i don't kno what speed im going do you know what else it could be it only statred after the repair and the sensors where replaced i had that checked out and the enigne light is still on and saying the sensors