Warning Messages
Shift to P position (for smart key system)
- This warning message illuminates if you try to turn off the engine without the shift lever in P (Park).
- In this case, the engine START/STOP button turns to the ACC position (if you press the engine START/STOP button again, it will turn to the ON position).
Low Battery (for Smart Key System)
- This warning message illuminates if the smart key battery is discharged when the engine START/STOP button is turned to the OFF position.
Press the START button while turning the steering wheel (for Smart Key System)
- This warning message illuminates if the steering wheel does not unlock normally when pressing the engine START/STOP button.
- This means you must press the engine START/STOP button while turning the steering wheel to the right and left.
Steering Wheel Unlocked (for Smart Key System)
- This warning message illuminates if the steering wheel does not lock when the engine START/STOP button is turned to the OFF position.
Check the Steering Wheel Lock System (for Smart Key System)
- This warning message illuminates if the steering wheel does not lock normally when the engine START/STOP button is turned to the OFF position.
Press the brake pedal to start the engine (for smart key system)
- This warning message illuminates if the engine START/STOP button is pressed twice to turn to the ACC position without depressing the brake pedal.
- This means you must depress the brake pedal to start the engine.
Key Not In Vehicle (for Smart Key System)
- This warning message illuminates if the smart key is not in the vehicle when the engine START/STOP button is pressed.
- This means you must always carry the smart key with you.
Key Not Detected (for Smart Key System)
- This warning message illuminates if the smart key is not detected when the engine START/STOP button is pressed.
Press the START button again (for Smart Key System)
- This means you can start the engine by pressing the engine START/STOP button again.
- If the warning appears every time you press the engine START/STOP button, have your vehicle checked by an authorized Kia dealer.
Press the START button with the key (for smart key system)
- This warning message illuminates if you press the engine START/STOP button while the "Key Not Detected" warning message is displayed.
- At this time, the immobilizer indicator blinks.
Check the BRAKE SWITCH fuse (for smart key system)
- This warning message appears if the brake switch fuse has blown.
- This means you should replace the fuse with a new one. If this is not possible, you can start the engine by pressing the engine START/STOP button for 10 seconds in the ACC position.
Shift to P or N to start the engine (for smart key system)
- This warning message illuminates if you try to start the engine with the shift lever not in P (Park) or N (Neutral).
✽ NOTICE
You can start the engine when the shift lever is in N (Neutral); however, it is recommended to start the engine with the shift lever in P (Park) for your safety.
Door/Hood/Trunk Open

- This means that a door, the hood, or the trunk is open.
- A hood warning message will appear on the LCD display when the hood is open.
The warning chime will sound when the vehicle is driven at a speed of 3 km/h (2 mph) or higher with the hood open.
Sunroof Open

- This warning message illuminates if you turn off the engine and then open the driver's door while the sunroof is open.
Window Open

- This warning message appears if you turn off the engine while any window is open.

- This warning pop-up message and light alert the driver that the road may be icy.
When the outside temperature is below approximately 4 °C,
- The indicator light (including the outside temperature) flashes 5 times, then stays on.
- A warning pop-up message will appear and the warning chime will sound once. This occurs only once per ignition cycle.
If this item is checked in User Settings, this function will be activated.
✽ NOTICE
If the black ice warning light illuminates while driving, continue to drive carefully and safely, avoiding excessive speed, rapid acceleration, sudden braking or sharp turns, etc.
Low Washer Fluid Level (if equipped)
- This warning message illuminates in the maintenance reminder mode if the washer fluid level in the reservoir is almost empty.
- This means you should add washer fluid.
Turn the FUSE SWITCH on.
- This warning message appears if the fuse switch on the fuse box is in the OFF position.
- This means you must turn on the fuse switch.
❈For more details, refer to "Fuses" in Chapter 7.
Low Fuel
• This warning message illuminates when the fuel tank is nearly empty.
- When the low fuel warning light comes on, refuel as soon as possible.
- When the trip computer shows "--- km (or miles)" as the driving range.
Check the High Beam Assist system
• This warning message appears if the High Beam Assist system malfunctions. In this case, have your vehicle checked by an authorized Kia dealer.
Check Headlamp
• This warning message appears if there is a malfunction (burned-out bulb or circuit fault) with the headlamp. In this case, have your vehicle checked by an authorized Kia dealer.
✽ NOTICE
- When replacing a bulb, use a bulb of the same wattage. For more information, refer to "BULB WATTAGE" in Chapter 8.
- If the vehicle is equipped with a bulb of different wattage, this warning message does not appear.
Check the Forward Collision-Avoidance Assist system.
- This warning message appears if there is a malfunction in the Forward Collision-Avoidance Assist (FCA) system. In this case, have your vehicle checked by an authorized Kia dealer.
❈ For more details, refer to the "Forward Collision-Avoidance Assist (FCA) System" section in chapter 5.
Battery Discharge Due to External Electrical Devices (if equipped)
• This message appears when excessive current consumption is detected. Be aware that the battery may discharge if aftermarket accessories are installed (e.g., device charging adapters, vehicle locators, video players, etc.).
If aftermarket devices are not installed or have been removed and the warning message remains, have your vehicle checked by an authorized Kia dealer.
Test yourself
A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.