U0102 on Land Rover
Lost Communication With Transfer Case Control Module
U0102 on Land Rover vehicles indicates lost communication with transfer case control module. Au7o has documented this code across 2 Land Rover models — most commonly on Discovery, Range Rover Sport. This network (U) code means a module on the vehicle's communication bus has lost contact with the transfer case control module. The transfer case control module manages four-wheel-drive and all-wheel-drive engagement, so loss of communication typically disables 4WD/AWD functions and lights a warning. The fault is most often in the wiring, connectors, power, or ground feeding the module rather than the bus itself. Regular braking and driving generally continue, but the affected drivetrain features may be unavailable. Typical repair costs on Land Rover range from $300 to $4,500, depending on the specific model and root cause.
Common Causes of U0102
- •Corroded or damaged connector at the transfer case module
- •Wiring fault (open/short) in the CAN bus or power/ground
- •Loss of power or poor ground to the module
- •Faulty transfer case control module
- •Water/road-salt intrusion into the harness
- •Blown fuse feeding the module
U0102 on Land Rover by Model
Land Rover Discovery(1 issue)
- Terrain Response System Faults and Mode Selection Failure2005-2016
The Terrain Response system on the LR3/LR4 develops faults where mode selection fails or the system defaults to General mode only. The rotary selector switch wears out internally, and the shift motor on the transfer case can fail. Corroded connectors at the transfer case are a common root cause. The vehicle remains drivable in General mode but loses off-road capability.
Land Rover Range Rover Sport(1 issue)
- Transfer Case Actuator Motor and Chain Failure2005-2013
The BorgWarner transfer case on the L320 Range Rover Sport suffers from actuator motor failures that prevent the vehicle from shifting between high and low range. The transfer case chain also stretches over time, causing a whining or grinding noise. In severe cases, the chain can skip, damaging the internal gears and requiring a complete transfer case rebuild.
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View U0102 across all makes →Frequently Asked Questions
What does U0102 mean on Land Rover?▼
U0102 stands for "Lost Communication With Transfer Case Control Module." This network (U) code means a module on the vehicle's communication bus has lost contact with the transfer case control module. The transfer case control module manages four-wheel-drive and all-wheel-drive engagement, so loss of communication typically disables 4WD/AWD functions and lights a warning. The fault is most often in the wiring, connectors, power, or ground feeding the module rather than the bus itself. Regular braking and driving generally continue, but the affected drivetrain features may be unavailable. On Land Rover specifically, this code is documented across 2 models.
What causes U0102 on Land Rover vehicles?▼
Common causes on Land Rover: Corroded or damaged connector at the transfer case module, Wiring fault (open/short) in the CAN bus or power/ground, Loss of power or poor ground to the module, Faulty transfer case control module, Water/road-salt intrusion into the harness. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0102 on a Land Rover?▼
Repair costs on Land Rover range from $300 to $4,500, depending on the specific model and root cause.
Which Land Rover models have U0102 documented?▼
Au7o has documented U0102 on 2 Land Rover models: Discovery, Range Rover Sport.