Code U0124 on the 2022 Chevrolet Equinox indicates lost communication with the lateral acceleration sensor module. This sensor measures sideways G-forces during cornering and is essential for the StabiliTrak electronic stability control system.
Lateral Acceleration Sensing
The lateral acceleration sensor (also called G-sensor) detects how much sideways force the vehicle experiences during turns. Combined with yaw rate data and wheel speeds, this helps StabiliTrak determine if the vehicle is sliding sideways and needs stability intervention. The sensor is critical for proper system function.
Stability System Impact
With U0124 present, StabiliTrak is disabled because it cannot accurately assess vehicle dynamics without lateral acceleration data. The StabiliTrak warning light and likely the traction control light illuminate. The ABS typically continues to function for basic anti-lock braking.
Diagnostic Approach
The lateral acceleration sensor is often combined with the yaw rate sensor in a single module located near the vehicle's center. Check under the center console or beneath the floor carpet. Inspect the connector for damage from liquid spills or moisture intrusion. Verify power, ground, and CAN communication.
Repair Considerations
If the sensor module has failed, replacement requires calibration to establish the proper zero-point reference. The sensor must be mounted on level ground during calibration. GM diagnostic equipment is required for the calibration procedure.