The 2023 Infiniti Q50's start-stop system helps improve fuel economy in city driving. When a "Start Stop System Check" message appears, Infiniti's diagnostics have detected a condition requiring attention. This message indicates more than simple non-activation—something needs to be evaluated.
Understanding the Check Message
The system check message differs from normal non-activation. When start-stop simply doesn't engage, no message typically appears. The check message means the system has detected an actual issue or persistent condition preventing operation that may require service.
Common Triggers
Several conditions trigger the system check message. A degraded battery falling below health thresholds is most common. Battery sensor faults preventing accurate monitoring cause the message. Charging system issues that don't maintain proper voltage can trigger it. Software faults requiring reset or update may also be responsible.
Battery System Importance
Infiniti uses an AGM battery designed for start-stop demands. The battery current sensor monitors state-of-charge precisely. Both the battery and sensor must function properly for the start-stop system to operate and avoid check messages.
Diagnostic Process
When the system check message appears, comprehensive diagnosis identifies the cause. Battery testing evaluates health beyond simple voltage. Sensor testing verifies accurate readings. Code scanning reveals specific faults. Infiniti's CONSULT diagnostic system provides detailed start-stop analysis.