Cadillac XTS key fob not recognized, vehicle will not start despite functional battery on Cadillac XTS

Some Cadillac XTS owners report experiencing issues with their key fob not being recognized, which prevents the vehicle from starting even when the battery is functional. A common cause for this problem is a dead key fob battery, and owners are advised to check and replace it if necessary. Additionally, those with a push-button start feature may see a 'key not detected' alert but can still start the vehicle due to the immobilizer's passive transponder system, even if the key fob battery is weak. Owners have also reported success with troubleshooting steps such as resetting the key fob, removing potential electronic interference, and reprogramming the key fobs. In some cases, disconnecting and reconnecting the car battery has been helpful. If the key fob remains unrecognized, using the physical key inside the fob to unlock the door and start the vehicle is an alternative method. For persistent issues, seeking assistance from a dealership is recommended, as they can diagnose and resolve more complex problems.