Sunday I got a warning code on my 1998 LS400 saying "Taillight Out" or something similar to that. After a while, it went out. I checked my taillights and a 5W side bulb was out. You could barely notice that it was out. Replaced it and everything is ok. Tonight the same warning came on and then went out in about 20 minutes. When we got to our destination we checked the taillights and all the bulbs were working fine. I'm not gonna lose sleep over this but is there something going on I need to know about?