Lincoln MKS anti-theft system activated after battery replacement, car won't start on Lincoln MKS

Some Lincoln MKS owners report experiencing issues with the anti-theft system being activated after a battery replacement, resulting in the car not starting. These owners often find that resetting the anti-theft system by inserting the key and turning it to the 'On' position can sometimes resolve the issue. Additionally, using the correct key with the necessary chip is crucial, as using an incorrect key might prevent the vehicle from starting. Some owners also check for the anti-theft light on the dashboard, which indicates the system's status, as a locked engine will not start. If problems persist, consulting a dealer for key reprogramming or to verify the key's transmission may be necessary. In some cases, performing relearn procedures specific to the Passlock system can help reset the anti-theft system.