The 2022 Genesis G70's ISG (Idle Stop & Go) system provides fuel efficiency in this performance luxury sedan. When "ISG Not Available" appears on the instrument cluster, specific conditions are preventing the feature from operating. Understanding these conditions helps determine whether service is needed.
Genesis ISG System
Genesis shares Hyundai's ISG technology but calibrates it for the G70's performance character. The system provides quick, refined restarts appropriate for a luxury sport sedan. Like other premium vehicles, it has strict requirements for activation to maintain refinement.
Why ISG Becomes Unavailable
Multiple conditions trigger the unavailable message. Battery state-of-charge below threshold is most common—the system requires reserve capacity for guaranteed restarts. Engine temperature below operating range keeps ISG unavailable until warm. High climate control demand prevents engine shutdown. Recent use of performance-oriented features may temporarily disable ISG.
Battery Considerations
The G70 uses an AGM battery designed for ISG demands. Battery health directly impacts system availability. Even a battery with acceptable voltage may lack the cycling capacity ISG requires. Genesis recommends specific battery specifications for ISG-equipped vehicles.
When to Seek Diagnosis
If ISG is never available despite favorable conditions—moderate weather, warmed up engine, fully charged battery—diagnosis is warranted. Persistent unavailability indicates either a degraded battery or system fault requiring professional attention.