do the doors automatically lock on 08 sedan

[CJMOWBRAY]

the last one i drove locked the doors when you started driving, this one i bought doesn't. is it broken? 2008 sedan.

[MUSKOKA800]

Mine don't lock while driving but does if I park and leave the car unlocked. I'm not sure how long before it happens but when I return it's locked tight.

TIP : don't walk away leaving the keys inside the car.