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Home >> Land Rover >> 2019 >> Range Rover Autobiography >> Repair and Diagnosis >> External Pages >> Different car >> Section 395 (Diagnostic Trouble Code Index DTC: Body Control Module (BCM) -- Range Rover/L405) >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Body Control Module (BCM) (G2165406) >> DTC B1B01-81: Key Transponder - Invalid serial data received >> Action

DTC B1B01-81: Key Transponder - Invalid serial data received: Action

WARNING: This page is about a different car, the 2021 Land Rover Range Rover and 2020 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: To validate the repair firstly remove the battery from the Smart key and check that the vehicle can be started through the back-up start procedure (holding the Smart key next to the immobilizer antenna unit and operating the stop start switch)