2023 HYUNDAI SONATA HYBRID Owners Manual

Foreword / Starting your Hybrid vehicle
1-12
Hybrid System Gauge
Power gauge

01
1-13
Warning and Indicator Lights
Ready indicator
This indicator illuminates:
When the vehicle is ready to be driven.
-ON : Normal driving is possible.
-OFF : Normal driving is not possible,
or a problem has occurred.
-Blinking : Emergency driving.
When the ready indicator goes OFF
or blinks, there is a problem with the
system. If this occurs, have your vehicle
inspected by an authorized HYUNDAI
dealer.
EV mode indicator
This indicator illuminates:
When the vehicle is driven by the electric
motor.
Service warning light
This warning light illuminates:
• When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- The service warning light illuminates
for approximately 3 seconds and
then turns off when all checks have
been performed.
• When there is a problem with the
hybrid vehicle control system or
hardware.
When the warning light illuminates while
driving, or does not go OFF after starting
the vehicle, have the vehicle inspected
by an authorized HYUNDAI dealer.
Regenerative brake warning
light
(yellow)
This warning light illuminates:
When the regenerative brake does not
operate and the brake does not perform
well. This causes the Brake Warning
light (red) and Regenerative Brake
Warning Light (yellow) to illuminate
simultaneously.
If this occurs, drive safely and have
your vehicle inspected by an authorized
HYUNDAI dealer. The operation of the
brake pedal may be more difficult than
normal and the braking distance may
increase.

Foreword / Starting your Hybrid vehicle
1-14
LCD Display Messages
Ready to start driving
OOSHQ019003LOOSHQ019003L
This message is displayed when the
vehicle is ready to be driven.
Check regenerative brakes
OOSHQ019004LOOSHQ019004L
This message is displayed when
the brake performance is low or the
regenerative brake does not work
properly due to a problem in the brake
system.
If this occurs, it may take longer for the
brake pedal to operate and the braking
distance may become longer.
Stop vehicle and check brakes
OOSHQ019006LOOSHQ019006L
This message is displayed when a
problem occurs in the brake system.
If this occurs, park the vehicle in a safe
location and tow your vehicle to the
nearest authorized HYUNDAI dealer and
have the vehicle inspected.
Check Hybrid system
OOSHQ019005LOOSHQ019005L
This message is displayed when there is a
problem with the hybrid control system.
Refrain from driving when the warning
message is displayed.
If this occurs, you have the vehicle
inspected by an authorized HYUNDAI
dealer.

01
1-15
Stop safely and check Hybrid system
OOSHQ019007LOOSHQ019007L
This message is displayed when there
is a problem with the hybrid control
system. The “
” indicator will blink
and a warning chime will sound until the
problem is solved. Refrain from driving
when the warning message is displayed.
If this occurs, you have the vehicle
inspected by an authorized HYUNDAI
dealer.
Check Hybrid system. Do not start
engine
OOSHQ019008LOOSHQ019008L
This message is displayed when the
hybrid battery power (SOC) level is low.
A warning chime will sound until the
problem is solved. Refrain from driving
when the warning message is displayed.
If this occurs, you have the vehicle
inspected by an authorized HYUNDAI
dealer.
Stop safely and check power supply
OOSHQ019009LOOSHQ019009L
This message is displayed when a
problem occurs in the power supply
system.
If this occurs, park the vehicle in a safe
location and tow your vehicle to the
nearest authorized HYUNDAI dealer and
have the vehicle inspected.
Check virtual engine sound system
OOSHQ019010LOOSHQ019010L
This message is displayed when there is
a problem with the Virtual Engine Sound
System (VESS).
If this occurs, you have the vehicle
inspected by an authorized HYUNDAI
dealer.

Foreword / Starting your Hybrid vehicle
1-16
Refuel to prevent Hybrid battery
damage
OOSHQ019011LOOSHQ019011L
This message is displayed when the fuel
tank is nearly empty.
You should refill the fuel tank to prevent
hybrid battery damage.
Refill inverter coolant
OOSHQ019012LOOSHQ019012L
This message is displayed when the
inverter coolant is nearly empty.
You should refill the inverter coolant.
Park with engine On to charge
battery
OOSHQ019013LOOSHQ019013L
This message is displayed when the
hybrid battery power (SOC) level is low.
If this occurs, park the vehicle in a safe
location and wait until the hybrid battery
is charged.
Start engine to avoid battery
discharge
OOSHQ019027LOOSHQ019027L
This message is displayed to inform the
driver the 12V battery may be discharged
if the ignition switch is in ON position
(without the
indicator ON).
Set the vehicle to the ready () mode
to prevent the 12V battery from being
discharged.

01
1-17
Energy Flow
The hybrid system displays the energy
flow in various operating modes. While
driving, the current energy flow is
specified in 11 modes.
Vehicle stop
ODN8HQ019001LODN8HQ019001L
The vehicle is stopped.
(No energy flow)
EV propulsion
ODN8HQ019002LODN8HQ019002L
Only the motor power is used to drive the
vehicle.
(Battery → Wheel)
Power assist
ODN8HQ019003LODN8HQ019003L
Both the motor and the engine power are
used to drive the vehicle.
(Battery & Engine → Wheel)
Engine only propulsion
ODN8HQ019004LODN8HQ019004L
Only the engine power is used to drive
the vehicle.
(Engine → Wheel)

Foreword / Starting your Hybrid vehicle
1-18
Engine generation
ODN8HQ019005LODN8HQ019005L
When the vehicle is stopped, the high-
voltage battery is charged up by the
engine.
(Engine → Battery)
Regeneration
ODN8HQ019007LODN8HQ019007L
The high-voltage battery is charged up
by the regenerative brake system.
(Wheel → Battery)
Engine brake
ODN8HQ019010LODN8HQ019010L
The engine braking is used to decelerate
the vehicle.
(Wheel → Engine)
Power reserve
ODN8HQ019008LODN8HQ019008L
The engine is simultaneously used to
drive the vehicle and to charge up the
high-voltage battery.
(Engine → Wheel & Battery)

01
1-19
Engine generation/motor drive
ODN8HQ019011LODN8HQ019011L
The engine charges up the high-voltage
battery. The motor power is used to drive
the vehicle.
(Engine → Battery → Wheel)
Engine generation/regeneration
ODN8HQ019009LODN8HQ019009L
The engine and regenerative brake
system charges up the high-voltage
battery.
(Engine & Wheel → Battery)
Engine brake/regeneration
ODN8HQ019012LODN8HQ019012L
The engine braking is simultaneously
used to decelerate the vehicle and to
charge up the high-voltage battery.
(Wheel → Engine & Battery)
Start engine to avoid battery
discharge
ODN8HQ019030LODN8HQ019030L
If the engine is not turned on with
the Engine Start/Stop button in ACC
or ON for a while, the battery can be
discharged. Please turn on the engine to
prevent 12V battery from discharge.