Did you check your fuses? May be a blown fuse.
The light tells you that your charging system is not working. Typically, it is either the battery, the alternator, or the serpentine belt that turns the alternator. Check your belt for proper tension and insure it is not slipping as your engine speed increases beyond idle speed.
Taver91 the battery and alternator is new
Djjairo760 do I need to check all the fuses
Looking for a Used LS 400 in your area?
CarGurus has 222 nationwide LS 400 listings and the tools to find you a great deal.
Search Lexus LS 400 Questions
Lexus LS 400 Experts