Hyundai Santa Fe: Idle Stop and Go (ISG) / ISG system off

LCD display messages

The messages are displayed on the instrument cluster to help use ISG system. Auto Stop is Off. Shift to P or N to start engine When the system is deactivated, the ISG off button indicator will illuminate and a message will appear on the cluster LCD display with a warning sound in the following situations...

Forced to restart engine

The engine is automatically restarted in the following situations. The brake vacuum pressure is low The engine has stopped for about 5 minutes The air conditioning is ON with the fan speed set to a certain high level The front defroster is ON The battery is weak The cooling and heating performance of the climate control system is unsatisfactory The vehicle is shifted to P (Park) or R (Reverse) when Auto Hold is activated The door is opened or the seatbelt is unfastened when Auto Hold is activated The EPB switch is pressed when Auto Hold is activated The Auto Stop () indicator blinks in green for 5 seconds on the instrument cluster when the engine is restarted...

Other information:

Hyundai Santa Fe (TM) 2019-2025 Service Manual: Components and components location

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Hyundai Santa Fe (TM) 2019-2025 Owner's Manual: Battery recharging

By battery charger Your vehicle has a maintenance-free, calcium-based battery. If the battery becomes discharged over a short time (because, for example, the headlamps or interior lights were left on while the vehicle was not in use), recharge it by slow charging (trickle) for 10 hours...