DTC B12CB-23: Start/Stop Eco-Start Enable Button - Signal stuck low: Action

NOTE: To validate the repair use the Jaguar Land Rover approved diagnostic equipment to perform the routine - On Demand Self Test. If the repair is successful this DTC will no longer be set within the body control module. Alternatively run the engine for 120 seconds and check the auto stop/start switch function, then use the Jaguar Land Rover approved diagnostic equipment to check this DTC is no longer set within the body control module

Refer to the electrical circuit diagrams and check the auto stop/start switch signal circuit for short circuit to ground. Repair the wiring harness as necessary
Check the operation of the auto stop/start switch. Free the stuck switch or install a new auto stop/start switch as necessary