2025 Hyundai Sonata Warning Lights and Indicators User Guide

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2025 Hyundai Sonata Warning Lights and Indicators User Guide

The 2025 Hyundai Sonata warning lights and indicators will be explained in this tutorial, along with how they help drivers monitor vehicle performance and potential faults. Get into the details.

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Video: 2025 Hyundai Sonata Warning Lights

Warning and indicator lights

Information
Make sure that all warning lights are OFF after starting the engine. If any light is still ON, this indicates a situation that needs attention.

Seat belt warning light

This warning light informs the driver that the seat belt is not fastened.

For more information, refer to the “Seat belts” section in chapter 3.

Airbag warning light

This warning light illuminates:

When the ignition switch is in the ON position. It illuminates for 3-6 seconds and then goes off.
- When there is a malfunction with the SRS.
  If the Airbag warning light remains illuminated while driving, have the vehicle inspected by an authorized HYUNDAI dealer.

Parking brake & brake fluid warning light

This warning light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off once the parking brake is released.
Whenever the parking brake is applied.
Whenever the brake fluid level in the reservoir is low.
- If the warning light illuminates with the parking brake released, it indicates the brake fluid level in the reservoir is low.

If the brake fluid level in the reservoir is low:

Drive carefully to the nearest safe location and stop your vehicle.
With the engine stopped, check the brake fluid level immediately and add fluid as required. For more information, refer to the “Brake fluid” section in chapter 9. After adding brake fluid, check all brake components for fluid leaks. If a brake fluid leak is found, or if the warning light remains on, or if the brakes do not operate properly, do not drive the vehicle. Have the vehicle inspected by an authorized HYUNDAI dealer.

Dual-diagonal braking system
Your vehicle is equipped with the dual-diagonal braking systems. This means you still have braking on two wheels even if one of the dual systems fails.

With only one of the dual systems working, more than normal pedal travel and greater pedal force are required to stop the vehicle.

Also, the vehicle does not stop in a short distance if only a portion of the braking system is working.

If you experience a malfunction with the braking system while driving, attempt to slow your vehicle by coasting or by using engine braking.

WARNING
If the Parking Brake warning light illuminates with the parking brake released, it indicates that the brake fluid level is low. Have the vehicle inspected by an authorized HYUNDAI dealer.

Anti-lock Brake System (ABS) warning light

This warning light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Whenever there is a malfunction with the ABS.
The hydraulic braking system still operates even if there is a malfunction with the ABS. If the ABS warning light remains illuminated while driving, have your vehicle inspected by an authorized HYUNDAI dealer.

Electronic Brake Force Distribution (EBD) system warning light

These two warning lights illuminate at the same time while driving:
When the ABS and brake system does not work normally.

If both the ABS warning light and the Parking Brake warning light remain illuminated while driving, have the vehicle inspected by an authorized HYUNDAI dealer.

WARNING
When both ABS and Parking Brake warning lights are on, the braking system does not work normally and you may experience an unexpected and dangerous situation during sudden braking.

Avoid high speed driving and abrupt braking.

Have the vehicle inspected by an authorized HYUNDAI dealer as soon as possible.

Information
When the ABS warning light is on or both ABS and Parking Brake warning lights are on, the speedometer, odometer, or tripmeter may not work. Also, the MDPS warning light may illuminate and the steering effort may increase or decrease.

Motor Driven Power Steering (MDPS) warning light

This warning light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Whenever there is a malfunction with the Motor Driven Power Steering.
If the MDPS warning light remains illuminated while driving, have the vehicle inspected by an authorized HYUNDAI dealer.

Charging system warning light

When there is a malfunction with either the alternator or electrical charging system.

If there is a malfunction with either the alternator or electrical charging system:

Drive carefully to the nearest safe location and stop your vehicle.
Turn the engine OFF and check the alternator drive belt for looseness or breakage.
If the belt is adjusted properly, there may be a problem in the electrical charging system.
If the Charging system warning light remains illuminated while driving, have the vehicle inspected by an authorized HYUNDAI dealer.

Engine oil level warning light

This warning light illuminates:
When the engine oil pressure is low.

If the engine oil pressure is low:

Drive carefully to the nearest safe location and stop your vehicle.
Turn the engine off and check the engine oil level (For more information, refer to the “Engine Oil” in chapter 9). If the level is low, add oil as required.
If the warning light remains on after adding oil or if oil is not available, have your vehicle inspected by an authorized HYUNDAI dealer as soon as possible.tick.

NOTICE

Continued driving with the warning light on may cause engine failure.
If the engine is not stopped immediately after the Engine Oil Pressure warning light is illuminated, severe damage could result.

Information
When engine oil pressure decreases due to insufficient engine oil, etc., the Engine Oil Pressure warning light illuminates. In addition, the enhanced engine protection system that limits engine power is activated. If the engine oil pressure is restored, the Engine Oil Pressure warning light and the enhanced engine protection system turn off. However, for gasoline 2.5 GDI & 2.5 T-GDI engine, when the engine oil pressure is restored, the warning light and the enhanced engine protection system turn off after the engine is restarted.

Low fuel level warning light

This warning light illuminates:
When the fuel tank is nearly empty. Refuel the vehicle as soon as possible.

NOTICE
Driving with the Low Fuel Level warning light on or with the fuel level below “E” may cause the engine to misfire and damage the catalytic converter.

Malfunction Indicator Lamp (MIL)

This warning light illuminates:

When the ignition switch is in the ON position. It illuminates for about 3 seconds and then goes off.
Whenever there is a malfunction with either the emission control system or the engine or the vehicle powertrain.
If the MIL warning light remains illuminated while driving, have the vehicle inspected by an authorized HYUNDAI dealer.
If the enhanced engine protection system activates due to the lack of engine oil, the engine power is limited. If such condition continues repeatedly, the Malfunction Indicator Lamp will illuminate.

NOTICE

Driving with the Malfunction Indicator Lamp (MIL) on may cause damage to the emission control system that may affect drivability and/or fuel economy.
If the Malfunction Indicator Lamp (MIL) illuminates, catalytic converter damage is possible that may result in loss of engine power.

NOTICE

If the Malfunction Indicator Lamp (MIL) illuminates, potential catalytic converter damage is possible which could result in loss of engine power. If this occurs, have your vehicle inspected by an authorized HYUNDAI dealer as soon as possible.

Master warning light

This warning light illuminates:
If a malfunction is detected in any of the following:

Forward Collision-Avoidance Assist malfunction
Forward Collision-Avoidance Assist radar blocked
Blind-Spot Collision-Avoidance Assist malfunction
Blind-Spot Collision-Avoidance Assist radar blocked
High Beam Assist malfunction
Lamp malfunction
Smart Cruise Control malfunction
Tire Pressure Monitoring System (TPMS) malfunction

If the issue is resolved, the Master warning light turns off.

Electronic Parking Brake (EPB) warning light

This warning light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Whenever there is a malfunction with the EPB.

If the EPB warning light remains illuminated while driving, have the vehicle inspected by an authorized HYUNDAI dealer

Information
The Electronic Parking Brake (EPB) warning light may illuminate when the Electronic Stability Control (ESC) indicator light comes on to indicate that ESC is not working properly. This does not indicate malfunction of EPB.

Low tire pressure warning light

This warning light illuminates:

When the ignition switch is in the ON position. It illuminates for about 3 seconds and then goes off.
When one or more tires are significantly underinflated. (The location of the under-inflated tire appears on the cluster display.)

For more information, refer to the “Tire Pressure Monitoring System (TPMS)” section in chapter 8.

This warning light remains ON after blinking for about 60 seconds, or repeatedly blinks ON and OFF at 3 second intervals:When there is a malfunction with the TPMS.

In this occurs, have the vehicle inspected by an authorized HYUNDAI dealer as soon as possible.

For more information, refer to the “Tire Pressure Monitoring System (TPMS)” in section chapter 8.

WARNING

The TPMS cannot alert you to severe and sudden tire damage caused by external factors.
If you notice any vehicle instability, immediately take your foot off the accelerator pedal, apply the brakes gradually with light force, and slowly move to a safe position off the road.

Inattentive Driving Warning light

This indicator light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Yellow: When Driver Attention Warning is disabled or a malfunction is detected. If the yellow indicator light remains on after the front view camera has been uncovered or unblocked, have your vehicle inspected by an authorized HYUNDAI dealer.

This indicator light blinks:

Yellow: Driver Attention Warning recommends to take a break.

For more information, refer to the “Driver Attention Warning (DAW)” section in chapter 7.

Lane Following Assist indicator light

This indicator light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Green: When Lane Following Assist is operating.
gray: When Lane Following Assist operating conditions are not satisfied.

This indicator light blinks:

White: When the steering wheel assist is canceled.

For more information, refer to the “Lane Following Assist (LFA)” section in chapter 7.

Lane Safety indicator light

This warning light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Gray: When Lane Keeping Assist operating conditions are not satisfied.
Green: When Lane Keeping Assist operating conditions are satisfied.
Yellow: When Lane Safety is deselected, disabled, or a malfunction is detected.

If the yellow warning light remains on after the sensor has been uncovered or unblocked when Lane Safety is set, we recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

This warning light blinks:

Green: When Lane Keeping Assist is operating.

For more information, refer to the “Lane Keeping Assist (LKA)” section in chapter 7.

Forward Safety warning light

This warning light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Yellow: When Forward Safety of Forward Collision-Avoidance Assist is deselected, disabled, or a malfunction is detected.
If the yellow warning light remains on after the sensor has been uncovered or unblocked when Forward Safety is set, have the vehicle inspected by an authorized HYUNDAI dealer.

This warning light blinks:

Red: When Forward Safety function is operating.

For more information, refer to the “Forward Collision-Avoidance Assist (FCA) (Front view camera only)” section in chapter 7.

LED headlight warning light

This warning light illuminates:

When the ignition switch is in the ON position. It illuminates for about 3 seconds and then goes off.
Whenever there is a malfunction with a LED headlight.

If the LED Headlight warning light remains illuminated while driving, have the vehicle inspected by an authorized HYUNDAI dealer.

This warning light blinks:
Whenever there is a malfunction with a LED headlight related part.

If this occurs, have the vehicle inspected by an authorized HYUNDAI dealer.

NOTICE
Driving with the LED Headlight warning light on or blinking may reduce LED headlight life.

Electronic Stability Control (ESC) indicator light

This indicator light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Whenever there is a malfunction with the ESC system.

If this occurs, have the vehicle inspected by an authorized HYUNDAI dealer.

This indicator light blinks:
While the ESC is operating.

For more information, refer to the “Electronic Stability Control (ESC)” section in chapter 6.

Electronic Stability Control (ESC) OFF indicator light

This indicator light illuminates:

• When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
When you deactivate the ESC system by pressing the ESC OFF button.

For more information, refer to the “Electronic Stability Control (ESC)” section in chapter 6.

Immobilizer indicator light

This indicator light illuminates for up to 30 seconds:

When the vehicle detects the smart key in the vehicle with the Button Start ignition switch in the ACC or ON position.

At this time, you can start the engine.
The indicator light goes off after starting the engine.

This indicator light blinks for a few seconds:
When the smart key is not in the vehicle, you cannot start the engine.

This indicator light illuminates for 2 seconds and goes off:
If the smart key is in the vehicle and the Button Start ignition switch is ON, but the vehicle cannot detect the smart key.

If this occurs, have the vehicle inspected by an authorized HYUNDAI dealer.

This indicator light blinks:
Whenever there is a malfunction with the immobilizer system.

If this occurs, have the vehicle inspected by an authorized HYUNDAI dealer.

Turn signal indicator light

This indicator light blinks:
When you operate the turn signal lever.

If any of the following occur, there may be a malfunction with the turn signal system.

The turn signal indicator light illuminates but does not blink.
The turn signal indicator light blinks rapidly.
The turn signal indicator light does not illuminate at all.

If any of these occur, have your vehicle inspected by an authorized HYUNDAI dealer.

High beam indicator light

This indicator light illuminates:

When the headlights are on and the turn signal lever is moved to the high beam position.
When the turn signal lever is pulled into the Flash-to-Pass position.

Light ON indicator light

This indicator light illuminates:
When the tail lights or headlights are on.

High Beam Assist indicator light

This indicator light illuminates:
When the high beam is on with the light switch in the AUTO light position.

White: When High Beam Assist is ready to operate.
Green: When High Beam Assist is operating.

If your vehicle detects oncoming or preceding vehicles, High Beam Assist system switches the high beam to low beam automatically.

For more information, refer to the “High Beam Assist (HBA)” section in chapter 5.

AUTO HOLD indicator light

This indicator light illuminates:

White: When you activate Auto Hold by pressing the AUTO HOLD switch.
Green: When you stop the vehicle completely by depressing the brake pedal with Auto Hold activated.
Yellow: Whenever a malfunction with the Auto Hold is detected.

If the AUTO HOLD indicator light remains yellow while driving, have the vehicle inspected by an authorized HYUNDAI dealer.

For more information, refer to the “Electronic Parking Brake (EPB)” section in chapter 6.

Speed Limiter indicator light

This indicator light illuminates:
When the speed limiter is enabled.

For more information, refer to the “Manual Speed Limit Assist (MSLA)” in chapter 7.

Intelligent Speed Limit Assist indicator light

This indicator light illuminates:

When the Engine Start/Stop button is in the ON position. It illuminates for about 3 seconds and then goes off.
Yellow: When Intelligent Speed Limit Assist is disabled, the front view camera is blocked, or a malfunction is detected.

If the yellow indicator light remains on after the front view camera has been uncovered or unblocked, have your vehicle inspected by an authorized HYUNDAI dealer.

For more information, refer to the “Intelligent Speed Limit Assist (ISLA)” section in chapter 7.

Cluster display messages

Vehicle is On
This message appears if you open the driver’s door when the gear is in P (Park) and the Engine Start/Stop button in the ON or START position.

Turn the engine off before leaving the vehicle.

Shift to P
This message appears if the Engine Start/Stop button is pressed to the OFF position without the gear in the P (Park) position.

If this occurs, the Engine Start/Stop button goes to the ACC position.

Vehicle is in N. Press START button and shift to P
This message appears if you try to turn off the vehicle with the gear in N (Neutral).

To turn off the vehicle:

Press the Engine Start/Stop button. The Engine Start/Stop button goes to the ON position.
Shift the gear to P (Park).
Press the Engine Start/Stop button again, then the vehicle turns off.

Low key battery
When the Engine Start/Stop button is pressed to the OFF position, a message may appear, indicating the internal battery of the smart key is low. Replace the smart key battery.

Press brake pedal to start engine
This message appears if the Engine Start/Stop button is pressed repeatedly without depressing the brake pedal.

Start the vehicle by depressing the brake pedal and then pressing the Engine Start/Stop button.

Key not in vehicle
This message appears if the smart key is not in the vehicle when you have left the vehicle with the Engine Start/Stop button in the ON or Start position.

Always turn off the engine before leaving your vehicle.

Press START button again
If you cannot start the vehicle after the Engine Start/Stop button is pressed, attempt to start the engine by pressing the Engine Start/Stop button again.

If the warning message appears each time you press the Engine Start/Stop button, have your vehicle inspected by an authorized HYUNDAI dealer.

Press START button with key
This message appears if the smart key is not detected when you press the Engine Start/Stop button after accessing with the smart key. Pressing the Engine Start/Stop button with the Smart key uses a different antenna.

Useful Links:

2024 Hyundai Sonata Review, Specs, Price and Mileage (Brochure)

2025 Hyundai Sonata Warning Lights and Indicators User Guide

Video: 2025 Hyundai Sonata Warning Lights