Car will not start due to anti theft

Best option is to replace the bad part. On some of them you can rebuild the lock by replacing bad springs or switches. I believe this one used a switch on the actuator or the actual lock cylinder to tell the anti-theft the lock status. But it does more than just locked/unlocked depending on how the system is armed and the actual door status, IE its one signal with the door opened and locked prior to closing, a different signal when the door is closed and locked and a combination of them when someone tampers with the lock.