Code Definition

U0235 (00-08) — Missing Communication With Front Distance Range Sensor

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

About U0235

U0235 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.

When U0235 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a sensor-related fault — the reported value from the named sensor is out of spec.

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 U0235 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

The vehicle control modules communicate over the Controller Area Network (CAN) to exchange sensor data and status information. DTC U0235 sets when the required CAN messages from the Front Distance Range Sensor are not received within a calibrated time period. A failure type byte of 00 denotes a general loss of communication, while an 08 qualifier indicates the message is missing. This is logged when the front distance range sensor, the forward facing radar used for adaptive cruise control and forward collision systems, is not communicating due to loss of power or ground, a CAN circuit fault, o...

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