Light sensor on ? Anyone
 

Does anyone have same problem i have my light indicator on and check all the bulb and everything works any clue anyone thnks

Did you check the third brake light?

Yes i did front lights to back ... I hope its not the sensor behind the seats the main one...

Do all the lights have the same intensity? Sometimes a dim bulb triggers the indicator.

I one time had a similar situation, and it ended up being an intermittent bulb on the 3rd brake light.

The sensor would say a bulb was out from time to time, but they all appeared to be working until finally the brake light went out completely.

My guess is that bulb has never been changed and is over a decade old, I'd take the $3 gamble and change it out and see what happens.

I might just change all the bulbs just in case i work @ a toyota dealer as part guy....so if anyone need parts and have part number for lexus some parts will be same as toyota thnks everyone 818-532-3652 andrey northridge toyota

if all the lights are working, you got a bad failure lamp sensor

By the way it only turn on when i turn on acc light or headlight

mines like that too, but only when i go reverse/drive.. i'm gonna try changing the bulbs first.. funny thing is when i clean the sensor and all the wires light goes off for a few mins, i drive around it comes back on

That means one of the filaments in the bulb is burned out.

Check all of the lights with the headlights on, and you will likely find one that isn't lit up fully.