U0140 on Land Rover
Lost Communication with BCM
U0140 on Land Rover vehicles indicates lost communication with bcm. Au7o has documented this code across 1 Land Rover model — most commonly on Range Rover Sport. U0140 is a network communication code meaning a module has lost communication with the body control module (BCM) over the vehicle's data bus. The BCM oversees many body and convenience functions — lighting, door locks, windows, wipers, anti-theft, and gateway communications — so losing contact with it can cause a wide range of seemingly unrelated electrical problems and warning lights. This is typically a wiring, connector, power/ground, or bus fault, or a failure of the BCM itself. Because the BCM often acts as a communication hub, this code can appear alongside other 'lost communication' codes. Typical repair costs on Land Rover range from $200 to $2,500, depending on the specific model and root cause.
Common Causes of U0140
- •Loss of power or ground to the BCM
- •CAN/data bus wiring damage, short, or open circuit
- •Corroded, loose, or damaged BCM connectors
- •Blown fuse feeding the BCM
- •Failed body control module
- •Water intrusion or corrosion in the harness
- •Another module faulting the shared data bus
U0140 on Land Rover by Model
Land Rover Range Rover Sport(1 issue)
- Water Intrusion from Tailgate / Rear Body Seals Causing Damp Cargo Area and Electrical Faults2023-2025
Owners of the redesigned Range Rover Sport have reported water leaks into the cargo area and rear body sections, often after rain or washing. The leak path is commonly suspected around tailgate seals, rear lamp/body interfaces, roof or upper tailgate trim areas, and can lead to damp carpeting, condensation, musty odor, or intermittent electrical faults in rear-mounted modules. Because several control units and connectors are located in the rear of the vehicle, prolonged moisture exposure can become expensive if not addressed early.
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What does U0140 mean on Land Rover?▼
U0140 stands for "Lost Communication with BCM." U0140 is a network communication code meaning a module has lost communication with the body control module (BCM) over the vehicle's data bus. The BCM oversees many body and convenience functions — lighting, door locks, windows, wipers, anti-theft, and gateway communications — so losing contact with it can cause a wide range of seemingly unrelated electrical problems and warning lights. This is typically a wiring, connector, power/ground, or bus fault, or a failure of the BCM itself. Because the BCM often acts as a communication hub, this code can appear alongside other 'lost communication' codes. On Land Rover specifically, this code is documented across 1 model.
What causes U0140 on Land Rover vehicles?▼
Common causes on Land Rover: Loss of power or ground to the BCM, CAN/data bus wiring damage, short, or open circuit, Corroded, loose, or damaged BCM connectors, Blown fuse feeding the BCM, Failed body control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0140 on a Land Rover?▼
Repair costs on Land Rover range from $200 to $2,500, depending on the specific model and root cause.
Which Land Rover models have U0140 documented?▼
Au7o has documented U0140 on 1 Land Rover model: Range Rover Sport.