It could be several things. the year make and model would need to be known for further diag. also the type of engine.
On my 2005 Colorado, the latch at the bottom had to be adjusted so when the door shuts it is a tight fit.
'Nox', in Latin, means 'night'. It used in the Harry Potter series; lumos produces light, nox shuts it off.
if no warning and it just shuts down but dash lights and radio light up check ignition switch
The gasoline engine usually shuts off when stopped at a red light.
if a hybrid is stoped at a red light it shuts the engine off to help save the enviorment
The alternator is most likely the problem
heat sensor
well that means that your car just BLOWS
the hold light on on my mazda truck b 2600 stays on or flashing and it shut the engine off
The orange light on a PS3 stands for... if you turn your playstation on and it makes a couple of beeps and the light comes on and shuts down its when your hard drive has been over used.
An angry man opens his mouth and shuts his eyes means that he isn't likely to hear reasoning. He will try to explain his perspective instead of listening.
Check the car computer for error codes, google them.