Lexus Troubleshooting Questions? Ask a Lexus Expert
Did you check the tire pressure in the spare tire? I believe that has a sensor in it. Set it to 40PSI and the 4 on the car to 35 psi and see if the light goes out after about 5 to 10 minutes.
Just reply as you have been. 35 is a better pressure from my experience. Better tire wear and less chance of TPWS lights when it gets cold.