DTC B1B01-00: Key transponder - Number of keys stored below minimum number required: Action

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2015 Jaguar XKR-S, 2015 Jaguar XKR, 2015 Jaguar XK, 2014 Jaguar XKR-S, and 2014 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.

Ensure all keys to be programmed are available
Check power and ground supplies to instrument cluster, start control unit. Clear diagnostic trouble code and retest
Check and replace faulty key as required
Check CAN network for noise/electromagnetic compatibility related issues. Ensure that the vehicle is away from sources of electromagnetic interference prior to clearing diagnostic trouble codes and retesting