Code Definition

U0422 — Invalid Data Received From Body Control Module (BCM)

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

About U0422

U0422 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 U0422 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 body and vehicle status information. DTC U0422 sets when one or more modules receive CAN messages from the Body Control Module that contain invalid, implausible, or out of range data. This indicates the data transmitted by the BCM does not correlate with expected operating conditions, typically due to internal BCM faults, an unstable power or ground supply, or CAN integrity issues. Because the BCM coordinates body functions and often relays network data, symptoms can be wide ranging, from lighting, lock,...

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