2018 KIA OPTIMA PHEV engine overheat

H39
Virtual Engine Sound System
(VESS)
The Virtual Engine Sound System
generates an engine sound for
pedestrians to hear vehicle while at
low speeds in EV mode.
High Voltage Battery Air Intake
Hybrid battery air intake
The hybrid battery air intake is locat-
ed on bottom the rear seats. The air
intake cools down the hybrid battery.
When the hybrid battery air intake is
blocked, the hybrid battery may be
overheated. Do not obstruct the air
intake with any other objects.
Plug-in Hybrid Vehicle
The high-voltage battery air intake is
located on the left side of the rear
seats. The air intake cools down the
high-voltage battery.
When the high-voltage battery air
intake is blocked, the high-voltage
battery may be overheated and the
vehicle performance may become
limited and set a hybrid warning
lamp. Do not obstruct the air intake
with any other objects.OJFHQ015005
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WARNING- Interference
with electronic medical
devices
Electromagnetic waves that are
generated from the charger can
impact medical electric devices
such as an implantable cardiac
pacemaker. When using such
medical electric devices, ask
your medical professional and
the device manufacturer
whether charging your electric
vehicle will impact the operation
of the medical electric devices.

Features of your vehicle
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4
Electric power steering (EPS)
The power steering uses a motor to
assist you in steering the vehicle. If
the engine is off or if the power steer-
ing system becomes inoperative, the
vehicle may still be steered, but it will
require increased steering effort.
The motor driven power steering is
controlled by a power steering con-
trol unit which senses the steering
wheel torque and vehicle speed to
command the motor.
The steering becomes heavier as the
vehicle’s speed increases and
becomes lighter as the vehicle’s
speed decreases for optimum steer-
ing control.
Should you notice any change in the
effort required to steer during normal
vehicle operation, have the power
steering checked by an authorized
Kia dealer. If the Electric Power Steering
System does not operate normally,
the warning light will illuminate on
the instrument cluster. The steering
wheel may require increased
steering effort. Take your vehicle to
an authorized Kia dealer and have
the vehicle checked as soon as
possible.
When you operate the steering wheel in low temperature, noise
may occur. If temperature rises, the
noise will likely disappear. This is a
normal condition.
When the vehicle is stationary, and the steering wheel is turned all the
way to the left or right continuous-
ly, the steering wheel becomes
harder to turn. The power assist is
limited to protect the motor from
overheating.
As time passes, the steering wheel
will return to its normal condition.
✽ ✽ NOTICE
The following symptoms may occur
during normal vehicle operation:
• The EPS warning light does not
illuminate.
• The steering gets heavy immedi- ately after turning the Engine
Start/Stop button is ON position.
This happens as the system per-
forms the EPS system diagnostics.
When the diagnostics are complet-
ed, the steering wheel will return
to its normal condition.
• A click noise may be heard from the EPS relay after turning the
Engine Start/Stop button is ON or
OFF position.
• A motor noise may be heard when the vehicle is at a stop or at a low
driving speed.
• If the Electric Power Steering System does not operate normally,
the warning light will illuminate on
the instrument cluster. The steer-
ing wheel may become difficult to
control or operate abnormally.
Take your vehicle to an authorized
Kia dealer and have the vehicle
checked as soon as possible. (Continued)
STEERING WHEEL

Features of your vehicle
88
4
This warning light remains on after
blinking for approximately 60 seconds
or repeats blinking and off at the
intervals of approximately 3 seconds:
When there is a malfunction with
the TPMS.
In this case, have your vehicle
inspected by an authorized Kia
dealer as soon as possible.
❈ For more details, refer to “Tire
Pressure Monitoring System
(TPMS)” in chapter 7. 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 slow-
ly move to a safe position off the
road.Electronic Parking Brake
(EPB) Warning Light(if equipped)
This warning light illuminates:
Once you set the Engine Start/Stop Button to the ON posi-
tion.
- It illuminates for approximately 3seconds and then goes off.
When there is a malfunction with the EPB.
In this case, have your vehicle
inspected by an authorized Kia
dealer.
✽ ✽ NOTICE- Electronic Parking
Brake (EPB) Warning Light
The Electronic Parking Brake
(EPB) Warning Light may illumi-
nate when the Electronic Stability
control (ESC) Indicator Light comes
on to indicate that the ESC is not
working properly (This does not
indicate malfunction of the EPB).
WARNING - Low tire pressure
Significantly low tire pressure makes the vehicle unstable
and can contribute to loss of
vehicle control and increased
braking distances.
Continued driving or low pres- sure tires will cause the tires to
overheat and fail.
EPB

Features of your vehicle
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4
Engine Coolant
Temperature WarningLight
This warning light illuminates:
When the engine coolant tempera- ture is above 248°F (120°C). This
means that the engine is overheat-
ed and may be damaged.
If your vehicle is overheated, refer
to “Overheating” in chapter 7.
Indicator Lights
Charging Cable
Connection Indicator (Plug-in hybrid)
This indicator illuminates in red when
the charging cable is connected.
Electronic StabilityControl (ESC) IndicatorLight
This indicator light illuminates:
Once you set the Engine Start/Stop Button to the ON posi-
tion.
- It illuminates for approximately 3seconds and then goes off.
When there is a malfunction with the ESC system.
In this case, have your vehicle
inspected by an authorized Kia
dealer.
This indicator light blinks:
While the ESC is operating.
❈ For more details, refer to
“Electronic Stability Control (ESC)”
in chapter 6.
CAUTION - Engine
Overheating
Do not continue driving with the
engine overheated. Otherwiseengine may be damaged.

Features of your vehicle
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Air conditioning system operation tips
If the vehicle has been parked in
direct sunlight during hot weather,
open the windows for a short time
to let the hot air inside the vehicle
escape.
To help reduce moisture inside of the windows on rainy or humid
days, decrease the humidity inside
the vehicle by operating the air
conditioning system.
During air conditioning system operation, you may occasionally
notice a slight change in engine
speed as the air conditioning com-
pressor cycles. This is a normal
system operation characteristic.
Use the air conditioning system every month only for a few minutes
to ensure maximum system per-
formance. When using the air conditioning
system, you may notice clear water
dripping (or even puddling) on the
ground under the passenger side
of the vehicle. This is a normal sys-
tem operation characteristic.
Operating the air conditioning sys- tem in the recirculated air position
provides maximum cooling, how-
ever, continual operation in this
mode may cause the air inside the
vehicle to become stale.
During cooling operation, you may occasionally notice a misty air flow
because of rapid cooling and
humid air intake. This is a normal
system operation characteristic.CAUTION - Excessive A/C
Use
When using the air conditioningsystem, monitor the tempera-ture gauge closely while drivingup hills or in heavy traffic whenoutside temperatures are high.Air conditioning system opera-tion may cause engine over-heating. Continue to use theblower fan but turn the air con-ditioning system off if the tem-perature gauge indicates engineoverheating.
CAUTION
When opening the windows inhumid weather, air conditioningmay create water dropletsinside the vehicle. Since exces-sive water droplets may causedamage to electrical equipment,air conditioning should only beused with the windows closed.

Features of your vehicle
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* The actual sunvisor lamp in the vehi-
cle may differ from the illustration.Power outlet (if equipped)
The power outlet is designed to pro-
vide power for mobile telephones or
other devices designed to operate
with vehicle electrical systems. The
devices should draw less than 10
amps with the engine running. Use the power outlet only when the
engine is running and remove the
accessory plug after use. Using the
accessory plug for prolonged peri-
ods of time with the engine off
could cause the battery to dis-
charge.
Only use 12V electric accessories which are less than 10A in electric
capacity.
Adjust the air-conditioner or heater to the lowest operating level when
using the power outlet.
Close the cover when not in use.
Some electronic devices can cause electronic interference when
plugged into a vehicle’s power out-
let. These devices may cause
excessive audio static and malfunc-
tions in other electronic systems or
devices used in your vehicle.
Push the plug in as far as it will go. If good contact is not made, the
plug may overheat and the fuse
may open.
CAUTION- Vanity mirror
lamp
If you use the vanity mirrorlamp, turn off the lamp beforereturning the sunvisor to itsoriginal position, otherwise itcould result in battery dis-charge and possible sunvisordamage.
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■ Front seat
■Rear seat

65
Driving your vehicle
WARNING- Check sur-roundings
Always check the surrounding
areas near your vehicle for peo-
ple, especially children, before
putting a vehicle into D (Drive)
or R (Reverse).
WARNING- Fire risk
When you intend to park or stop
the vehicle with the engine on,
be careful not to depress the
accelerator pedal for a long
period of time. It may overheat
the engine or exhaust system
and cause fire.WARNING- Loose objects
Securely store items in your
vehicle. When you make a sud-
den stop or turn the steering
wheel rapidly, loose objects
may drop on the floor and it
could interfere with the opera-
tion of the foot pedals, possibly
causing an accident.WARNING- Driving while intoxicated
Do not drive while intoxicated.
Drinking and driving is danger-
ous. Even a small amount of
alcohol will affect your reflexes,
perceptions and judgment.
Driving while under the influ-
ence of drugs is as dangerous
as or more dangerous than driv-
ing drunk.

623
Driving your vehicle
To release EPB (electronic parking
brake) automatically:
Shift lever in P (Park)With the engine running depress
the brake pedal and shift out of P
(Park) to R (Reverse) or D (Drive).
Shift lever in N (Neutral) With the engine running depress
the brake pedal and shift out of N
(Neutral) to R (Reverse) or D
(Drive).
Automatic Transaxle 1. Start the engine.
2. Fasten the driver's seat belt.
3. Close the driver's door, engine hood and trunk.
4. Depress the accelerator pedal while the shift lever is in R (Rear),
D (Drive) or Sports mode.
Make sure the brake warning light
goes off.✽ ✽ NOTICE
• For your safety, you can engage
the EPB even though the engine
stop/start button is in the OFF
position, but you cannot release it.
• For your safety, depress the brake pedal and release the parking
brake manually with the EPB
switch when you drive downhill or
when backing up the vehicle.
Do not follow the above procedure
when driving on a flat level ground.
The vehicle may suddenly move for-
ward.
✽ ✽ NOTICE
If the parking brake warning light is
still on even though the EPB has
been released, have the system
checked by an authorized Kia dealer.
EPB (electronic parking brake) may
be automatically applied when:
The EPB is overheated
Requested by other systems
The hybrid system is turned off
with the EPB applied
✽ ✽ NOTICE
If the driver turns the hybrid system
off while Auto Hold is operating,
EPB will be automatically applied.
CAUTION
Do not drive your vehicle with
the EPB applied. It may causeexcessive brake pad and brakerotor wear.