Your car's side-to-side motion sensor (lateral accelerometer) is sending a bad signal to the stability control system, like a broken level tool that can't tell which way is level. The vehicle's electronic stability system can't properly detect sideways acceleration and may not work correctly during sharp turns or emergency maneuvers.
The ECU monitors the lateral accelerometer's voltage output as the vehicle turns, expecting a signal proportional to sideways force. When the sensor signal falls outside normal operating range or becomes erratic, the system flags a fault to prevent false stability interventions.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor Output Voltage | 0.5–4.5 volts (varies by design) | Below 0.5V or above 4.5V, or signal noise exceeds tolerance |
| Signal Rate of Change | Gradual, predictable transitions during maneuvers | Rapid spikes or frozen readings inconsistent with vehicle motion |