TPMS and Wheel weights...

hey, I noticed my passenger rear tire lost a wheel weight... and my tire pressure light is on.
I filled tires with air and the pressure are good...
should I bring to the shop to have the weight replaced? and what are you thoughts about the tpms??I didn't check the spare thou... it has been chained up since forever.

 

Wheel weight has nothing to do with the TPMS Light. After you filled up the tires did you drive around until the light goes out? And did the 09 have 5 Sensors

 

yeah i think i do have 5 sensors... so what I noticed the TPMS blinks like a min or so before it stays solid. I was searching on tacoma world and found they can go back after so many yrs since they have batteries on them... I am not spending $120 a sensor, also my rims are getting old and its coating is chipping away!!... I guess 12 yrs old... its showing a sign of aging.