Car shuts off and then on

Hello, honestly shutting off doesn't really give us enough to go on to figure out what direction to look at. You could have a charging system or battery problem causing a lot of electrical power intermittently. Lots of electrical power can cause important modules to lose power and shut down, causing a stall. You could have an engine performance issue, such as one with fuel delivery, ignition spark, air to the intake or emissions control. Something there can cause a stall. Hands on testing is really needed to figure out which way to go for diagnosis and repair. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops