2018 5L V8 about 85000 miles.

This morning my CEL came on. I filled the fuel, after a few restarts CEL went out. After a couple more restarts (running errands and going to July 4 evets all day) it came back on. There's excessive valve knocking and it appears that it's lost power. Before I go have the code checked I wondered if anyone had any ideas or if this has been addressed previously. I did a search but didn't find anything

Thanks in advance.

 

What codes is it throwing?

 

You can't run the vehicles until the code is Read.
When was the last time the oil level was checked.
Otherwise there is nothing to go on and may ruin the engine, then it's too late.
Are you willing to take that chance?