Dodge Challenger Owner's Manual page 320

318 STARTING AND OPERATING
will turn off. The vehicle may need to be driven for up to
20 minutes above 15 mph (24 km/h) in order for the
TPMS to receive this information.
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.