DTC 44: Last Message Received With Encryption Error: Description
The digital RF message received was from a Remote Keyless Entry (RKE) transmitter that is programmed to Body Control Module (BCM), but message did not pass encryption security test. No remote function capabilities will exist.
DTC 44 will set when RKE transmitter has been in program or synchronize mode while out of range of BCM. Fault may also be present if digital RF message has an error. Most likely cause is that RKE transmitter is out of synchronization.