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I have a 2010 LEXUS RX350. I followed the instructions to reset the tire low pressure warning light. It blinked three times but did not stay off. I have 34psi in each tire including the spare.
Can the sensors in the valves be checked to see if one of them is bad?
Double check the pressures with a different gauge.
I had one sensor die around the five year mark. Dealer replaced it and the rest have been fine. You say you have a 2010, that's a third gen, check their forum for specifics on how to test the sensors.