Don't attempt to remove the sensor unless you're someplace (i.e. tire shop) where the valve can be replaced if/when the sensor breaks off some of the corroded aluminum valve and you lose air.
Been there, done that with the galvanic corrosion caused by the brass valve cap on the aluminum tire pressure sensor valve stem ($110.00) on the Lexus SUV. Weakened to the point that the end of the valve broke off when the cap was removed. Now I use plastic valve caps.
Bruce & Donna, plus 2 Rhodesian Ridgebacks
2003 Alpine Coach 36-FDDS, WA, MT & OR