is a faulty coolant temp sensor the reason for the car stalling and not restarting?

i was driving for about 5min and at a stop te car stalled it would restart then eventually it did i drove on and at a next stop it stalled again and wouldnt restart i then had to call the AA and it restarted again the AA person checked all the fuses and were ok he then checked te engine and told me he suspects the coolant temp sensor was faulty which was causing the stall and not restarting i just want a second opinion thanks