2017 KIA OPTIMA PLUG-IN HYBRID coolant temperature

Remaining charge time (Plug-in
hybrid)
The message is displayed to notify the
remaining time to fully charge the bat‐ tery.
EV/HEV/CHG modes (Plug-in
hybrid)
A corresponding message is displayed
when a mode is selected by pressing the HEV button.
Battery charged. Maintaining
current (Plug-in hybrid)
This message is displayed when unable
to convert to charging mode even when pressing and holding the HEV button
during EV/HEV mode driving because
the high-voltage (hybrid) battery is al‐ ready fully charged.
Low battery. Maintaining hybrid
(Plug-in hybrid)
This message is displayed when unable
to convert to EV mode even when pressing the HEV button during HEV
mode driving due to insufficient high-
voltage (hybrid) battery level.
Low battery temp. Maintaining
current (Plug-in hybrid)
This message is displayed when unable
to convert to EV mode even when pressing the HEV button during HEV
mode driving due to low battery tem‐
perature.
Charging complete. Switching to
hybrid (Plug-in hybrid)
This message is displayed automatical‐
ly converting to HEV mode due to com‐
pleted battery charging during charging mode driving.
Charger error! (Plug-in hybrid)
This messages is displayed when the
charging failed by external charger er‐
ror.
This message is for Normal charger.
The purpose of this message is to let you know the error has occurred in
charger itself not in vehicle.
Low/high system temp.
Maintaining hybrid (Plug-in hybrid)
This message is displayed when unable
to convert to EV mode even when
pressing the HEV button during HEV mode driving due to low/high system
temperature.
Switching to hybrid mode to allow
heating (Plug-in hybrid)
• When the coolant temperature is lower than -14 °C (57 °F), and you
turn the climate control On for heat‐
ing, the above message will be dis‐
played in the cluster. Then, the vehi‐ cle will automatically switch to HEV
mode.
• When the coolant temperature is higher than -14 °C (57 °F), or you
turn the climate control Off, the vehi‐
cle will automatically return to EV mode.
Wait until fuel door opens (Plug-in
hybrid)
The message is displayed when you at‐
tempt to open the fuel filler lid with the fuel tank pressurized. Wait until the
fuel tank is depressurized.
NOTICE
•It may take up to 20 seconds to
open fuel filler lid.
(Continued)

1-21
1
Hybrid system overview

EV/HEV/CHG modes (Plug-in
Hybrid)
A corresponding message is displayed
when a mode is selected by pressing the HEV button.
Battery charged. Maintaining
current (Plug-in Hybrid)
This message is displayed when unable
to convert to charging mode even when pressing and holding the HEV button
during EV/HEV mode driving because
the high-voltage (hybrid) battery is al‐ ready fully charged.
Low battery. Maintaining hybrid
(Plug-in Hybrid)
This message is displayed when unable
to convert to EV mode even when
pressing the HEV button during HEV
mode driving due to insufficient high-
voltage (hybrid) battery level.
Low battery temp. Maintaining
current (Plug-in Hybrid)
This message is displayed when unable
to convert to EV mode even when pressing the HEV button during HEV
mode driving due to low battery tem‐
perature.
Charging complete. Switching to
hybrid (Plug-in Hybrid)
This message is displayed automatical‐
ly converting to HEV mode due to com‐
pleted battery charging during charging mode driving.
Charger error! (Plug-in Hybrid)
This message is displayed when the
charging failed by external charger er‐ ror.
The purpose of this message is to let
you know the error has occurred in
charger itself not in vehicle.
Low/high system temp.
Maintaining hybrid (Plug-in Hybrid)
This message is displayed when unable
to convert to EV mode even when pressing the HEV button during HEV
mode driving due to low/high system
temperature.
Switching to hybrid mode to allow
heating (Plug-in Hybrid)
• When the coolant temperature is lower than -14°C (57°F), and you
turn the climate control On for heat‐ ing, the above message will be dis‐
played in the cluster. Then, the vehi‐
cle will automatically switch to HEV
mode. • When the coolant temperature is
higher than -14°C (57°F), or you turnthe climate control Off, the vehicle
will automatically return to EV mode.
Wait until fuel door opens (Plug-in
Hybrid)
The message is displayed when you at‐
tempt to open the fuel filler lid with the fuel tank pressurized. Wait until the
fuel tank is depressurized.
NOTICE
•It may take up to 20 seconds to
open fuel filler lid.
•When the fuel filler lid is frozen
and does not open after 20 sec‐
onds at freezing temperature,
slightly tap the fuel filler lid and
then attempt to open it.
Fuel door open (Plug-in Hybrid)
This message is displayed when the
fuel filler lid is opened.
Also means "Ready to refuel".

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5
Features of your vehicle

• When the coolant temperature is low:The system will be limited until en‐
gine performance becomes normal.
• When driving up a hill: The system will be limited to gain
power when driving uphill because the engine torque is restricted.
• When using manual mode: The system will be limited according
to the shift location.
• When the accelerator pedal is deeply depressed for a few seconds:
The system will be limited, judging
that the driver wants to speed up.
SPORT mode
SPORT
SPORT mode focu‐ ses on dynamic driv‐ing by automatically
controlling thesteering wheel, en‐gine and transaxlesystem.
• When the DRIVE MODE button is pressed and the SPORT mode is se‐
lected, the SPORT indicator (yellow) will illuminate. • Whenever the hybrid system is re‐
started, the Drive Mode will revert
back to ECO mode. If SPORT mode is
desired, re-select SPORT mode from
the DRIVE MODE button
• If the system is activated: - After speeding, it maintains the gear and RPM for some time even
though the accelerator pedal is not depressed.
- Up-shifting is delayed.
NOTICE
In Sport drive mode, the fuel effi‐
ciency may decrease.
Driving your vehicle
7-76

DRIVE MODE INTEGRATED CONTROL SYSTEM (IF EQUIPPED)
Plug-in hybrid vehicle
0+')1-
The drive mode may be selected ac‐
cording to the driver’s preference or road condition.
The system resets to be in the ECO
mode, when the hybrid system is re‐
started.
If there is a problem with the instru‐ ment cluster, the drive mode will be in
ECO mode and may not change to NOR‐
MAL mode.
The mode changes whenever the DRIVE MODE button is pressed.
/03."- &$0
❈ When normal mode is selected, it is
not displayed on the cluster.
ECO mode (Active ECO)
ECO
Active ECO helps
improve fuel effi‐
ciency by control‐ling certain en‐gine and trans‐axle system op‐erating parame‐ters. Fuel effi‐ciency depends
on the driver'sdriving habit and
road condition.
• When the DRIVE MODE button is pressed and the ECO mode is selec‐
ted, the ECO indicator (green) will illu‐ minate to show that the Active ECO
is operating.
• When the Active ECO is activated, it does not turn off even though the
engine is restarted again. To turn off
the system, press the DRIVE MODE button again.
When Active ECO is activated:
• The acceleration may slightly be re‐ duced eventhough you depress the
accelerator fully.
• The air conditioner performance may be limited
• The shift pattern of the automatic transaxle may change.
• The engine noise may get louder.
The above situations are normal condi‐
tions when the active eco system is ac‐
tivated to improve fuel efficiency.
Limitation of Active ECO operation:
If the following conditions occur while Active ECO is operating, the system op‐
eration is limited even though there is
no change in the ECO indicator. • When the coolant temperature is low: The system will be limited until en‐
gine performance becomes normal.
• When driving up a hill: The system will be limited to gainpower when driving uphill because
the engine torque is restricted.
• When using manual mode: The system will be limited according
to the shift location.

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7
Driving your vehicle

COOLANT
The high-pressure cooling system has
a reservoir filled with year round anti‐
freeze coolant. The reservoir is filled at the factory.
Check the antifreeze protection and
coolant level at least once a year, at the
beginning of the winter season, and be‐ fore traveling to a colder climate.
CAUTION
•When the engine overheats fromlow engine coolant, suddenly add‐ing engine coolant may causecracks in the engine. To preventdamage, add engine coolant slowlyin small quantities.
•Do not drive with no engine cool‐ant. It may cause water pump fail‐ure and engine seizure, etc.
Checking the coolant level
WARNING
nRemoving radiator cap
•Never attempt to remove the radi‐ator cap while the engine is oper‐ating or hot. Doing so might leadto cooling system and engine dam‐age. Also, hot coolant or steamcould cause serious personal in‐jury.
•Turn the engine off and wait untilit cools down. Use extreme carewhen removing the radiator cap.Wrap a thick towel around it, andturn it counterclockwise slowly tothe first stop. Step back while thepressure is released from the cool‐ing system.When you are sure all the pressurehas been released, press down onthe cap, using a thick towel, andcontinue turning counterclockwiseto remove it.
(Continued)
(Continued)
•Even if the engine is not operating,do not remove the radiator cap orthe drain plug while the engine andradiator are hot. Hot coolant andsteam may still blow out underpressure, causing serious injury.
The engine coolant and/or inverter
coolant level is influenced by the hybrid system temperature. Before checking
or refilling the engine coolant and/or in‐
verter coolant, turn the hybrid vehicle off.
WARNING
The electric motor (cool‐ing fan) is controlled byengine coolant tempera‐ture, refrigerant pressureand vehicle speed. It maysometimes operate evenwhen the engine is notrunning.
(Continued)
Maintenance
9-26

(Continued)
Use extreme caution when workingnear the blades of the cooling fan sothat you are not injured by a rotat‐ing fan blades. As the engine coolanttemperature decreases, the electricmotor will automatically shut off.This is a normal condition.If your vehicle is equipped with GDI,the electric motor (cooling fan) mayoperate until you disconnect thenegative battery cable.
Engine coolant
0+'
Check the condition and connections of
all cooling system hoses and heater ho‐ ses. Replace any swollen or deteriora‐
ted hoses.
The coolant level should be filled be‐
tween F (Full) and L (Low) marks on the side of the coolant reservoir when the
engine is cool.
If the coolant level is low, add enough
specified coolant to provide protection against freezing and corrosion. Bring
the level to F (Full), but do not overfill.
If frequent additions are required, we
recommend that the system be inspec‐
ted by an authorized Kia dealer.
Inverter coolant
Check the condition and connections of
all cooling system hoses. Replace any swollen or deteriorated hoses.
The coolant level should be filled be‐
tween MAX and MIN marks on the side
of the coolant reservoir when the en‐ gine is cool.
If the coolant level is low, add enough
specified coolant to provide protection
against freezing and corrosion. Bring the level to MAX, but do not overfill. If
frequent additions are required, we rec‐
ommend that the system be inspected
by an authorized Kia dealer.

9-27
9
Maintenance

Drivinþ oýý-road............................................................ 7-102
E
ECO mode (Drive mode inteþrated control sys‐ tem)........................................................................7-75,7-77
Economical operation..................................................... 7-97
Electric power steerinþ........................................ 5-40,5-44
Electronic parkinþ brake (EPB)..................................... 7-19
Electronic stability control (ESC).................................. 7-30
Emerþency ýuel ýiller lid release......................... 5-30,5-33
Emerþency startinþ........................................................ 8-05
Emerþency Stop Siþnal (ESS)........................................ 7-35
Emission control system............................................... 9-91 Crankcase emission control system........................9-91
Evaporative emission control system..................... 9-91
Exhaust emission control system........................... 9-91
Enþine compartment............................................3-07,9-03
Enþine coolant................................................................. 9-26
Enþine coolant temperature þauþe............................. 5-53
Enþine number.............................................................. 10-16
Enþine oil.......................................................................... 9-24
Enþine speciýication......................................................10-03
Enþine start/stop button.............................................. 7-06 Enþine start/stop button position........................... 7-06
Illuminated enþine start/stop button..................... 7-06
Enþine start/stop button illumination.........................7-06
Evaporative emission control system......................... 9-91
Exhaust emission control system................................ 9-91
Explanation oý scheduled maintenance items........... 9-21
Exterior care.................................................................... 9-85
Exterior overview (Front).............................................. 3-02
Exterior overview (Rear)................................................3-03
F
FCC.................................................................................. 6-121
Floor mat anchor(s)......................................................5-161Fluid Brake ýluid.................................................................... 9-30
Washer ýluid.................................................................9-31
Foþ liþht (rear).............................................................. 5-119
Foldinþ the outside rearview mirror............................ 5-46
Foot parkinþ brake..........................................................7-18
Front seat adjustment (manual).................................. 4-05
Front seat adjustment (power)....................................4-06
Fuel ýiller lid............................................................ 5-29,5-31
Emerþency ýuel ýiller lid release..................... 5-30,5-33
Alphabetical index
I-4 Alphabetical index