DTC B10AC-81: Cruise Control Switch - Invalid serial data received: Action

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2015 Jaguar XKR-S, 2015 Jaguar XKR, 2014 Jaguar XKR-S, 2014 Jaguar XKR, and 2013 Jaguar XKR-S. However, it is still accessible from the selected car via links, so may be relevant.

Clear the DTC and press all the steering wheel switches, re-check for DTCs. Refer to the appropriate electrical circuit wiring diagrams and check the speed control switch circuit for open circuit, short circuit to power, short circuit to ground, disconnected
Check and install a new steering wheel module as required. Refer to the warranty policy and procedures manual, or determine if any prior approval program is in operation, prior to the installation of a new module/component