Dodge Challenger 2012 Owner's Manual page 331

STARTING AND OPERATING 329
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 (-
5
-) in place of the pressure value to indicate which sensor
is not being received.