Code Definition

U0214 — CAN Bus No Communication With Remote Function Actuator

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

About U0214

U0214 is a generic (obd-ii standard) network communication diagnostic trouble code. 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 U0214 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

Control modules on the vehicle network exchange data with the Remote Function Actuator (RFA), which receives radio signals from the key fob and handles remote locking, passive entry, and keyless start authorisation. DTC U0214 is set when a receiving module does not receive valid CAN messages from the RFA within a calibrated time period while overall network communication remains active. This indicates the RFA is offline because of loss of power or ground, an open, short, or high resistance fault in its CAN connection, or an internal RFA failure. When this code is set the driver may find remote...

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