RX350 low tire pressure light is on. All 5 tires are at 36 lbs./sq. in. All 5 sensors are in working order. I have a 2 position switch for a 2nd set of tires and have run the test in both positions. I was advised that it could be a coding issue. I have run by my Lexus dealer and feel that they want to reinvent the wheel. I really don't want to have let them spend hours on and start at square 1. They were told that the sensors and pressures are perfect but they keep wanting to check my tire pressure. That has been done 50 times already. I only want the light to go out and don't care about anything else. Any hints would be greatly appreciated.

 

Have you tried resetting the TPMS system? The instructions for doing that are in the Lexus Owner's Manual.

 

+1 for restting TPMS....