Code Definition

U0124 — Lost Communication with Lateral Acceleration Sensor Module

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

About U0124

U0124 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 U0124 is stored, the module has detected 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 U0124 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 ABS and VSC ECU relies on lateral acceleration data, usually from a combined yaw rate and G sensor module, to calculate vehicle dynamics for stability and traction control, and it receives this data over the CAN network. DTC U0124 is stored when the ABS and VSC ECU does not receive valid lateral acceleration messages within a specified time, or when CAN communication with the sensor module is interrupted. When this happens the system disables or limits stability and traction control as a fail safe, because it cannot trust the vehicle motion data. The driver will usually see the VSC, tracti...

Join TaT to view the complete code information and diagnostic details.

Quick Facts