Code Definition

U0429 — Implausible Data Received From Steering Column Module (SCM)

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

About U0429

U0429 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 U0429 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 Steering Column Module (SCM) sends data such as ignition status, multifunction switch states, and steering wheel control inputs to the Body Control Module, Powertrain Control Module, and other modules over the CAN data network. DTC U0429 is a generic network code set when a receiving module is still receiving messages from the SCM but the data they contain is implausible, out of range, or in conflict with other related inputs. Because the bus link is working, this is a plausibility fault, so the problem lies in the value being reported, an internal switch or sensor in the column, the modul...

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