Hello, Lexus Community

is there anyone out there that has a 98-00 LS400 that experienced a issue involving stalls and cut offs and the info display shows the battery light , the VSC warning, the Headlight leveling warning, and ABS warning but when plugged up to diagnostics code reader it pops up with no codes plus the battery is brand new and alternator checks out fine but the car dies and after a while it starts back up again I have kno idea what’s going on the owners manual says if the battery light comes on while driving it’s discharging so I checked the belt and everything and all checks out but she keeps dying and after a while starts back up but not with full electrical power. Sorry for the rambling but I’m just lost because I can’t pin point the issue to repair it so if there’s anyone who haves and idea of what this issue can be your knowledge and assistance would be gratefully appreciated.