Hyundai Elantra Owners Manual

Hyundai Elantra: Engine start/stop button

Driving your vehicle / Hyundai Elantra: Engine start/stop button

Illuminated engine start/stop button (if equipped)

Hyundai Elantra: Illuminated engine start/stop button (if equipped). Whenever the front door is opened, the engine start/stop button will illuminate

Whenever the front door is opened, the engine start/stop button will illuminate for your convenience. The light will go off immediately when the engine start/stop button is turned on or go off after about 30 seconds when the door is closed.

Engine start/stop button position

OFF

with manual transaxle

To turn off the engine, stop the vehicle then press the engine start/stop button with the engine start/stop button ON.

with automatic transaxle

To turn off the engine, press the engine start/stop button with the engine start/stop button ON and the shift lever in P(Park). When you press the engine start/stop button without the shift lever in P(Park), the engine start/stop button does not turn to the OFF position but to the ACC position.

✽ NOTICE

When you turn off the engine, the vehicle should be stopped.

WARNING

In an emergency situation while the vehicle is moving, you can turn off the engine and turn the engine start/stop button to the ACC position by pressing the engine start/stop button for more than 2 seconds or 3 times successively within 3 seconds. If the vehicle is moving, you can restart the engine without pressing the brake pedal by pressing the engine start/stop button with the shift lever in N(Neutral).

ACC(Accessory)

with manual transaxle

Press the engine start/stop button when the button is in the OFF position without depressing the clutch pedal.

with automatic transaxle

Press the engine start/stop button when the button is in the OFF position without depressing the brake pedal.

If you leave the engine start/stop button in the ACC position for more than 1 hour, the button is turned off automatically to prevent the battery from discharging.

ON

with manual transaxle

Press the engine start/stop button when the button is in the ACC position without depressing the clutch pedal.

with automatic transaxle

Press the engine start/stop button when the button is in the ACC position without depressing the brake pedal.

The warning lights can be checked before the engine is started. Do not leave the button in the ON position if the engine is not running to prevent the battery from discharging.

START

with manual transaxle

To start the engine, depress the clutch pedal and brake pedal, then press the engine start/stop button with the shift lever in the N(Neutral) position.

with automatic transaxle

To start the engine, depress the brake pedal and press the engine start/stop button with the shift lever in the P(Park) or the N (Neutral) position.

✽ NOTICE

If you press the engine start/stop button without depressing the clutch pedal on manual transaxle vehicles or without depressing the brake pedal on automatic transaxle vehicles, the engine will not start and the engine start/stop button changes as follows: OFF →ACC → ON → OFF

If you leave the engine start/stop button in the ACC or the ON position for a long time, the battery may be discharged.

WARNING

Never press the engine start/stop button while the vehicle is in motion. This would result in loss of directional control and braking function, which could cause an accident.
Before leaving the driver’s seat, always make sure the shift lever is engaged in 1st gear for the manual transaxle or P (Park) for the automatic transaxle, set the parking brake fully and shut the engine off. Unexpected and sudden vehicle movement may occur if these precautions are not taken.
Never reach for the engine start/stop button, or any other controls through the steering wheel while the vehicle is in motion. The presence of your hand or arm in this area could cause a loss of vehicle control, an accident and serious bodily injury or death.
Do not place any movable objects around the driver’s seat as they may move while driving, interfere with the driver and lead to an accident.

Starting the engine

WARNING

Always wear appropriate shoes when operating your vehicle. Unsuitable shoes (high heels, ski boots, etc.) may interfere with your ability to use the brake, accelerator and clutch pedal (if equipped).

1.Carry the smart key or leave it inside the vehicle.

2.Make sure the parking brake is firmly applied.

3. Manual Transaxle - Depress the clutch pedal fully and shift the transaxle into Neutral. Depress the brake and clutch pedal fully.
Automatic Transaxle - Place the transaxle 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.

5.In extremely cold weather (below - 18°C / 0°F) or after the vehicle has not been operated for several days, let the engine warm up without depressing the accelerator.

Whether the engine is cold or warm, it should be started without depressing the accelerator.

CAUTION

If the engine stalls while you are in motion, do not attempt to move the shift lever 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.

Even if the smart key is in the vehicle, but it is not close to the driver’s seat area, then the engine 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, and if all doors are closed, the chime will sound for about 5 seconds. Keep the smart key in the vehicle, when using the ACC position or if the vehicle engine is on.

WARNING

The engine will start by pressing the engine start/stop button, only when the smart key is in the vehicle. Never allow children or any person who is unfamiliar with the vehicle to touch the engine start/stop button or related parts.

Hyundai Elantra: Starting the engine. ✽ NOTICE

✽ NOTICE

If the 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.
When the stop lamp 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 engine by pressing the engine start/stop button for 10 seconds with the engine start/stop button in the ACC mode. Always depress the brake pedal and clutch pedal (if equipped) before starting the engine.

CAUTION

Do not press the engine start/stop button for more than 5 seconds except when the stop lamp fuse is disconnected.

The crankcase emission control system in the Hyundai Elantra redirects blow-by gases back into the combustion process to reduce emissions. This system prevents oil mist and hydrocarbons from escaping into the atmosphere. A core part of this system is the positive crankcase ventilation (PCV) valve. Over time, the PCV valve can clog, affecting engine idle and increasing oil consumption. Regular inspection and cleaning of the PCV system help maintain smooth engine operation. A clogged valve may lead to pressure buildup and gasket leaks. Replacing the PCV valve is an affordable way to prevent bigger issues. The system supports cleaner combustion and extends oil life. Understanding its function gives insight into internal engine recycling. This control method is essential for cleaner, more efficient driving.