Code Definition

U0197 (87) — T-Box CAN Message Not Received

System: Network Communication  |  Type: Generic (OBD-II Standard)  |  Make: LDV

About U0197

U0197 is a generic (obd-ii standard) network communication diagnostic trouble code recorded for LDV vehicles. It belongs to the U-prefix family of codes, which covers inter-module network communication (CAN, LIN, FlexRay, or similar) faults.

Scanning & clearing: Network (U) codes report communication faults between modules. When diagnosing U-codes, checking the vehicle's CAN bus integrity, supply/ground at each module, and reading all modules for related faults is usually the first step.

Because U0197 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC U0197:87 is set when one or more control modules on the vehicle CAN network detect that expected messages from the Telematics Control Unit, also referred to as the telematics box, are not being received within the calibrated timeout period. The 87 sub code indicates that the expected CAN messages are simply not arriving. This means the telematics module is offline, unpowered, asleep, or otherwise unable to communicate correctly on the network. Because this module handles connected services, the fault can affect emergency call functions, remote vehicle features, data connectivity, and stole...

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