Vehicle shut off at stop light and will not start

When you say it is not starting, does the vehicle even crank and not start or does it not do anything when you turn the key? Here is a guide that we need to run through if it is not doing anything:

https://www.2carpros.com/articles/starter-not-working-repair

If it cranks but does not start then we need to start with this guide:

https://www.2carpros.com/articles/car-cranks-but-wont-start

Also, here is a guide that will help with checking fuel pressure which is the first thing we need if the engine will crank but not start:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let's start with this and then go from there. Thanks