Dodge Challenger 2012 Owner's Manual page 340

338 STARTING AND OPERATING
Service TPMS Warning
If a system fault is detected, the "TPM Telltale Light" will
flash on and off for 75 seconds and then remain on solid.
The system fault will also sound a chime. In addition, the
EVIC will display a SERVICE TPM SYSTEM message
for a minimum of five seconds and then display dashes
(- -) in place of the pressure value to indicate which
sensor is not being received.