Possible Causes
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
RKE DTC'S PRESENT
TEST TRANSMITTER WITH TESTER
RKE TRANSMITTER NOT PROGRAMMED
TESTING THE REMOTE KEYLESS ENTRY MODULE
REPLACE TRANSMITTER
RKE MODULE