You can try this relearn procedure. If this does not work, the system will need to be scanned with a class 2 scanner to see what component if any has failed.
30 Minute Re-Learn Procedure
The vehicle learns the PasslockTM Sensor Data Code and/or password XXXXX the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
Document ID# XXXXX