Land Rover LR2 smart keys not functioning for locking/unlocking doors and starting engine, KVM and RF receiver replaced on Land Rover LR2

Some Land Rover LR2 owners report experiencing issues with their smart keys not functioning for locking/unlocking doors and starting the engine. A common cause for this problem is the internal battery of the key failing, which can prevent the remote from working. Additionally, if the smart key remains unresponsive after a battery change, it may indicate that the key itself is damaged or that the Body Control Module (BCM) or smart key receiver requires resetting. Some owners have found that replacing the vehicle's battery can lead to the key fob becoming unresponsive, despite following online re-sync steps. A dead battery in the key fob is also frequently cited as a reason for malfunction, as these button cell batteries have specific voltage requirements and expiration dates. Furthermore, issues with key recognition and keyless ignition can sometimes be resolved by changing the key fob battery and performing a sync. Intermittent messages indicating that the Smart Key cannot be located may occur, but typically, waiting a few seconds allows the electronic key fob to be found and authenticated. In persistent cases where the backup location does not start the vehicle and the Smart Key not found message continues, some owners recommend attempting a Vehicle Reset using the Symptom Driven Diagnostics (SDD) tool to reset all modules on the CAN bus networks. Addressing these potential issues is crucial for effectively troubleshooting and resolving smart key functionality problems.