Has any work been done on the wiring? If so I would say that someone has reversed the brake and reverse light wire. Does the brake light come on when you put it in reverse? If so then reverse the wires. If not then you possible have a screwy grounding problem. You will just have to take out the tail lamp and check the condition of the wires and connectors. I hope this helps some.
I have a 1994 Lexus ES300 and when my brake light came on, it meant that one of my brakes lines had busted. Eventually I had NO brakes. Not sure if this would apply to yours. Get it checked out before it is to late.
what is the green p warning light on lexus is250
what does vsc warning light mean on lexus ex 350
how do you change the high mounted stop light on a lexus Is300?
check fluid level
The brake light on the Vauxhall Vectra has a circle with 6 lines around it. When this light appears the vehicle is telling the driver that it is time to replace the brakes.
Follow the link below, labeled "How to replace a Lexus IS300 tail light"
It is the brakes light switch
This Lexus maintenance light illuminates every 5,000 miles driven on the vehicle. This is a reminder light that will indicate when maintenance service is needed.
What is the problem for pcs light
probably have to have a Lexus dealer turn it off
probably have a bad master cylinder.