Depending on the options ordered when the car was manufactured the low tire warning may not be an option through the radio. Try turning your key to the ON position, then turning your parking lights on and off 3 times within 5 seconds. This should clear the warning message. You will hear a 'ding' if the reset was successful.

 

Hey turbo!
I just wanted to tell you that I changed out the fuel level sender today and it totally fixed the problem! Thanks again for your help! =]

 

Glad I could help!!