I have 2013 Nissan Sentra sometime when I start my car my car the engine shut down except headlights and radio work
Could be a clogged fuel filter. When was it last changed? Need to see some codes.
Doesn't have fuel filter
Yes it does. It's inside the gas tank.
The mechanic said doesn't have one
The mechanic is either lying or doesn't know what he's talking about. The filter is IN THE GAS TANK.
How many miles are on the car? Do you have a check engine light or any trouble codes?
172479 yes the engine light is on
You should have the car checked with a scan tool for a trouble code that is causing the check engine light to be on and is the most likely reason your engine shuts off.
Auto Zone and many other auto parts stores will do it as a free service. Good luck.
The filter is built into the fuel pump. See the screen at the bottom?