There are no separate drivers for left and right side ports. If one works than other one should work fine too.    Release static charge by disconnecting charger and holding the power button down for 30 seconds.  Update BIOS  RESET BIOS to default 
So I have a Dell XPS 7390 and for the past two days, the top left USB C port is no longer working.  This has happened before, and I managed to get it working again but I don't remember how.  Can someone help me figure out how to check it and possibly fix it?
XPS 7390 Left Side USB C Port Not Working