What does the TPMS dashboard light/warning indicate?

A TPMS warning light might display if:

1.   The tire pressure on one or more tires is too high or too low. A variation of 25% from the recommended air pressure will cause a malfunction light;
2.   One or more of the TPMS sensors may be broken or sensor batteries may be dead;
3.   TPMS receivers may not be able to receive sensor signals;
4. The TPMS module may not be functioning.