The engine cut out while driving and the won't start.

This sounds like the crankshaft angle sensor or the fuel pump has gone out, when you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?

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

Please run down this guide and report back.

When it doesn't start, you need to check if there is fuel pump pressure and if there is spark to the engine. One will be missing. Once you narrow it down to the ignition system or the fuel system, it will be easier to diagnose the problem.

NOTE: If the check engine light is staying on, have the computer scanned for trouble codes. Most parts stores will do it for free if you can get it there. If you need directions for checking for spark or fuel pump pressure, refer to our homepage under the DIY section.