[mtofell]

"TPMS" light just means you've lost communication with one or more of the sensors. The low-pressure icon (exclamation point in parentheses?) means one of your tires is reading low (via the sensor). The sensors wear out after a number of years and need to be replaced - my 2008 just finally started showing the light consistently. Of course, you're free to live dangerously and check your tires visually and/or with a gauge as we all did for +/- 100 years before the sensors and dash light existed (somehow most of us survived).