Possible Causes

SJB DTC B2425 RKE out of synchronization
remote transmitter button pressed a substantial amount of times while outside the range of the vehicle
remote transmitter

PINPOINT TEST 6: REMOTE KEYLESS ENTRY TRANSMITTER OUT OF SYNCHRONIZATION

PINPOINT TEST 6		THE REMOTE KEYLESS ENTRY TRANSMITTER IS OUT OF SYNCHRONIZATION
STEP	INSPECTION		ACTION
1	RESYNCHRONIZE THE INOPERATIVE REMOTE TRANSMITTER Key OFF. Press any button on the inoperative remote transmitter four times consecutively within 30 seconds. Does the remote transmitter operate correctly now?	Yes	The system is OK. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
1		No	Go to next step.
2	CHECK FOR A SECOND REMOTE TRANSMITTER Check for another remote transmitter that operates with the vehicle. Is there another remote transmitter that operates with the vehicle?	Yes	Go to next step.
2		No	Go to step 4.
3	RESYNCHRONIZE THE INOPERATIVE REMOTE TRANSMITTER USING THE SECOND REMOTE TRANSMITTER Key OFF. Press any button on the operational remote transmitter. Within 30 seconds, press a button on the inoperative remote transmitter. Check the inoperative remote transmitter for correct operation. Does the inoperative remote transmitter operate now?	Yes	The system is OK. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
3		No	Go to next step.
4	PROGRAM THE INOPERATIVE REMOTE TRANSMITTER OR ALL THE REMOTE TRANSMITTERS Reprogram the inoperative remote transmitter individually using the WDS or equivalent Tester or reprogram all remote transmitters using the manual key cycle method. See REMOTE TRANSMITTER PROGRAMMING . Does the inoperative remote transmitter operate now?	Yes	The system is OK. INFORM the customer any remote transmitters not present will need to be reprogrammed. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
4		No	To diagnose the inoperative remote transmitter, See PINPOINT TEST 5: THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY REMOTE TRANSMITTER .