Hyundai Ioniq: Engine Start/Stop Button / Starting the Vehicle

Hyundai Ioniq (AE) 2017-2024 Owner's Manual / Driving your vehicle / Engine Start/Stop Button / Starting the Vehicle


  • Always wear appropriate shoes when operating your vehicle. Unsuitable shoes, such as high heels, ski boots, sandals, flip-flops, etc., may interfere with your ability to use the brake and accelerator pedals.
  • Do not start the vehicle with the accelerator pedal depressed. The vehicle can move and lead to an accident.
  • Wait until the engine rpm is normal. The vehicle may suddenly move if the brake pedal is released when the rpm is high.


  • The vehicle will start by pressing the Engine Start/Stop button, only when the smart key is in the vehicle.
  • Even if the smart key is in the vehicle, if it is far away from the driver, the vehicle may not start.
  • When the Engine Start/Stop button is in the ACC or ON position, if any door is open, the system checks for the smart key. If the smart key is not in the vehicle, the "Hyundai Ioniq. Starting the Vehicle" indicator will blink and the warning "Key not in vehicle" will come on and if all doors are closed, the chime will also sound for about 5 seconds. Keep the smart key in the vehicle when in the ACC position or if the vehicle is in the ready (Hyundai Ioniq. Starting the Vehicle) mode.

1. Always carry the smart key with you.

2. Make sure the parking brake is applied.

3. Make sure the shift lever is in P (Park).

4. Depress the brake pedal.

5. Press the Engine Start/Stop button. If the vehicle starts, the "Hyundai Ioniq. Starting the Vehicle" indicator will come on.


  • Do not wait for the engine to warm up while the vehicle remains stationary. Start driving at moderate engine speeds. (Aggressive accelerating and decelerating should be avoided.)
  • Always start the vehicle with your foot on the brake pedal. Do not depress the accelerator while starting the vehicle. Do not rev the engine while warming it up.


To prevent damage to the vehicle:

  • If the "Hyundai Ioniq. Starting the Vehicle" indicator turns off while you are in motion, do not attempt to shift to the P (Park) position. If traffic and road conditions permit, you may put the shift lever in the N (Neutral) position while the vehicle is still moving and press the Engine Start/Stop button in an attempt to restart the engine.
  • Do not push or tow your vehicle to start the vehicle.


To prevent damage to the vehicle:

When the stop lamp switch fuse is blown, you can't start the engine normally. Replace the fuse with a new one. If you are not able to replace the fuse, you can start the vehicle by pressing and holding the Engine Start/Stop button for 10 seconds with the Engine Start/ Stop button in the ACC position.

Do not press the Engine Start/Stop button for more than 10 seconds except when the stop lamp switch fuse is blown.

For your safety always depress the brake pedal before starting the vehicle.

Hyundai Ioniq. Starting the Vehicle


If the smart key battery is weak or the smart key does not work correctly, you can start the engine by pressing the Engine Start/Stop button with the smart key in the direction of the picture above.

    Engine Start/Stop Button Positions


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