U0124 indicates that the vehicle's CAN network has detected a loss of communication from the lateral acceleration sensor module. This sensor supplies side‑grip data used by stability and traction control systems.
The sensor may have failed internally, ceasing to transmit data on the CAN bus.
Corroded, broken, or loose wiring and connector pins can interrupt the sensor's signal.
A short, open, or electromagnetic interference on the CAN bus affecting the sensor's data line can cause loss of communication.
A malfunctioning body control or gateway module that processes the sensor data may drop the message.
A rare software issue in the power‑train control module can trigger the code, but this is uncommon.
No. Replacing the power‑train control module is rarely required; most often the issue is the sensor, its wiring, or a CAN bus problem.
Yes. Repairing or resealing a damaged connector or wire often resolves the communication loss without needing component replacement.
No. It is primarily used by stability and traction control systems, not by the airbag system.
It typically takes 30–60 minutes to verify bus voltages, check for shorts, and confirm proper communication with all modules.