Car cuts off after running for twenty minutes

Welcome to 2CarPros.

Based on your description, it sounds like either you have a bad crankshaft position sensor or a bad fuel pump. When it stalls, does it feel like the key was turned off or does it feel like it's running out of gas?

Take a look through this link. It discusses the symptoms of a bad crankshaft position sensor. See if it seems to mirror your issue.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Also, if it doesn't, I suggest checking fuel pressure. Here is a link that shows in general how it is done:

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

Let me know your thoughts. Also, let me know if the check engine light stays on when the engine is running.

I will watch for your reply.

Joe