1.Carry the smart key or place it inside the vehicle.
2.Make sure the parking brake is firmly applied
3.Place the shift lever in P (Park). Depress the brake pedal fully. You can also start the engine when the shift lever is in the N (Neutral) position.
4.Press the engine start/stop button while depressing the brake pedal.
5.Do not wait for the engine to warm up while the vehicle remains stationary. Start driving at moderate engine speeds. (Steep accelerating and decelerating should be avoided.)
WARNING - Unintended vehicle movement
Never leave the smart key in the vehicle with children or vehicle occupants who are unfamiliar with the vehicle operation. Pushing the engine start/stop button while the smart key is in the vehicle may result in unintended engine activation and/or unintended vehicle movement.

Do not press the ENGINE START/ STOP button for more than 10 seconds except when the stop lamp fuse is blown.
Kia Stinger (CK) 2018-2023 Owner's Manual: High Mounted Stop Lamp
Repair procedures Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the tailgate upper trim. (Refer to Body - "Tailgate Trim") 3. Disconnect the high mounted stop lamp connector (A). 4. Remove the high mounted stop lamp (A) after loosening the mounting bolts.Kia Stinger (CK) 2018-2023 Owner's Manual: Automatic Transmission System
Special service tools Special Service Tools Tool Name / Number Illustration Description Inhibitor switch guide pin (Parking switch guide pin) 09480-D2100 Used for fixing "N" range when installing inhibitor switch (Used for fixing "P" range when installing parking switch) Troubleshooting Troubleshooting Limp Home Mode Features a fail-safe function that prevents dangerous situations in the event of a transmission failure.