2011 Hyundai Sonata Hybrid check engine light

Features of your vehicle
68 4
The rearview camera will activate when
the back-up light is ON with the engine
start/stop button ON and the shift lever in
the R position.
This system is a supplemental system
that shows behind the vehicle through
the monitor while backing-up.
✽ ✽
NOTICE
The rearview camera may not operate
normally, in extremely high or low
temperatures (operating temperature :
-13°F~149°F (-20°C~65°C)).
The hazard warning flasher should be
used whenever you find it necessary to
stop the car in a hazardous location.
When you must make such an emer-
gency stop, always pull off the road as far
as possible.
The hazard warning lights are turned on
by pushing in the hazard switch. This
causes all turn signal lights to blink. The
hazard warning lights will operate even
though the key is not in the engine
start/stop button.
To turn the hazard warning lights off,
push the switch a second time.
REAR VIEW CAMERA (IF EQUIPPED)
WARNING
This system is a supplementary
function only. It is the responsi-
bility of the driver to always
check the inside/outside rearview
mirror and the area behind the
vehicle before and while backing
up.
Always keep the camera lens
clean. If the lens is covered with
foreign matter, the camera may
not operate normally.
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HAZARD WARNING FLASHER
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53
Driving your vehicle
Before entering vehicle
• Be sure that all windows, outside mir-
ror(s), and outside lights are clean.
Check the condition of the tires.
Check under the vehicle for any sign of
leaks.
Be sure there are no obstacles behind
you if you intend to back up.
Necessary inspections
Fluid levels, such as engine oil, engine
coolant, brake fluid, and washer fluid
should be checked on a regular basis,
with the exact interval depending on the
fluid. Further details are provided in sec-
tion 7, “Maintenance”.
Before starting
Close and lock all doors.
Position the seat so that all controls are
easily reached.
Adjust the inside and outside rearview
mirrors.
Be sure that all lights work.
Check all gauges.
Check the operation of warning lights
when the engine start/stop button is
turned to the ON position.
Release the parking brake and make
sure the brake warning light goes out.
For safe operation, be sure you are famil-
iar with your vehicle and its equipment.
BEFORE DRIVING
CALIFORNIA PROPOSI-
TION 65 WARNING
Engine exhaust and a wide variety
of automobile components and
parts, including components found
in the interior furnishings in a vehi-
cle, contain or emit chemicals
known to the State of California to
cause cancer and birth defects and
reproductive harm. In addition, cer-
tain fluids contained in vehicles
and certain products of component
wear contain or emit chemicals
known to the State of California to
cause cancer and birth defects or
other reproductive harm.

55
Driving your vehicle
Illuminated engine start/stop but-
ton
Whenever the front door is opened, the
engine start/stop button will illuminate for
your convenience. The light will go off
after about 30 seconds when the door is
closed.
HEV system start/stop button
position
OFF
To turn off the system, press the engine
start/stop button with the engine
start/stop button in the ON position 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 turns to the ACC posi-
tion.
✽ ✽
NOTICE
When you turn off the HEV system, the
vehicle should be stopped.
ACC(Accessory)
Press the HEV system start/stop button
while it is in the OFF position without
depressing the brake pedal.
The electrical accessories are operative.
If you leave the HEV system start/stop
button in the ACC position for more than
1 hour, the battery power will turn off
automatically to prevent the battery from
discharging.
ON
Press the HEV system start/stop button
while the button is in the ACC position
without depressing the brake pedal.
The warning lights can be checked
before the HEV system is started. Do not
leave it in the ON position if the HEV sys-
tem is not running to prevent battery dis-
charge.
START
To start the hybrid system, press the
brake pedal and press the HEV system
start/stop button with the shift lever in the
P(Park).
ENGINE START/STOP BUTTON
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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 sec-
onds. If the vehicle is moving over
10km/h, you can restart the engine
without pressing the brake pedal by
pressing the engine start/stop but-
ton regardless of transaxle position.

517
Driving your vehicle
If the parking brake does not release or
does not release all the way, have the
system checked by an authorized
HYUNDAI dealer.
Check the brake warning light by turning
the engine start/stop button ON (do not
start the engine). This light will be illumi-
nated when the parking brake is applied
with the engine start/stop button in the
START or ON position.
Also, the brake warning light may illumi-
nate for a second even though the park-
ing brake is released at the moment the
engine start/stop button is turned to the
ON position.
Before driving, be sure the parking brake
is fully released and the brake warning
light is off.
If the brake warning light remains on after
the parking brake is released while the
hybrid system is in READY state, there
may be a malfunction in the brake sys-
tem. Immediate attention is necessary.If at all possible, cease driving the vehicle
immediately. If that is not possible, use
extreme caution while operating the vehi-
cle and only continue to drive the vehicle
until you can reach a safe location or
repair shop.
WARNING
To prevent unintentional move-
ment when stopped and leaving
the vehicle, do not use the
gearshift lever in place of the
parking brake. Set the parking
brake AND make sure the
gearshift lever is securely posi-
tioned in P (Park) for automatic
transaxle equipped vehicles.
Never allow anyone who is unfa-
miliar with the vehicle to touch
the parking brake. If the parking
brake is released unintentionally,
serious injury may occur.
All vehicles should always have
the parking brake fully engaged
when parking to avoid inadver-
tent movement of the vehicle
which can injure occupants or
pedestrians.
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WARNING
It is normal for the brake warning
light to illuminate temporarily
when the brake is depressed
repeatedly and go out after a few
seconds when the brake is not
depressed. But the braking dis-
tance might be longer when the
brake pedal is depressed while
the brake warning light is on.
Have your system checked if the
brake warning light is on. It may
lead to an accident.

519
Driving your vehicle
✽ ✽
NOTICE
When you jump start your vehicle
because of a drained battery, the engine
may not run as smoothly and the ABS
warning light may turn on at the same
time. This happens because of the low
battery voltage. It does not mean your
ABS is malfunctioning.
• Do not pump your brakes!
• Have the battery recharged before
driving the vehicle.
Electronic stability control (ESC)
The Electronic Stability control (ESC)
system is designed to stabilize the vehicle
during cornering maneuvers. ESC checks
where you are steering and where the
vehicle is actually going. ESC applies the
brakes at individual wheels and
intervenes in the engine management
system to stabilize the vehicle.
W-78
CAUTION
If the ABS warning light is on and
stays on, you may have a problem
with the ABS. In this case, howev-
er, your regular brakes will work
normally.
The ABS warning light will stay on
for approximately 3 seconds after
the engine start/stop button is ON.
During that time, the ABS will go
through self-diagnosis and the
light will go off if everything is nor-
mal. If the light stays on, you may
have a problem with your ABS.
Contact an authorized HYUNDAI
dealer as soon as possible.
CAUTION
When you drive on a road having
poor traction, such as an icy road,
and operate your brakes continu-
ously, the ABS will be active con-
tinuously and the ABS warning
light may illuminate. Pull your car
over to a safe place and stop the
engine.
Restart the engine. If the ABS
warning light is off, then your
ABS system is normal.
Otherwise, you may have a prob-
lem with the ABS. Contact an
authorized HYUNDAI dealer as
soon as possible.
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Driving your vehicle
20 5
The Electronic Stability Control (ESC)
system is an electronic system designed
to help the driver maintain vehicle control
under adverse conditions. It is not a
substitute for safe driving practices.
Factors including speed, road conditions
and driver steering input can all affect
whether ESC will be effective in
preventing a loss of control. It is still your
responsibility to drive and corner at
reasonable speeds and to leave a
sufficient margin of safety.
When you apply your brakes under con-
ditions which may lock the wheels, you
may hear a “tik-tik’’ sound from the
brakes, or feel a corresponding sensation
in the brake pedal. This is normal and it
means your ESC is active.
✽ ✽
NOTICE
A click sound may be heard in the
engine compartment when the vehicle
begins to move after the engine is start-
ed. These conditions are normal and
indicate that the Electronic Stability
Control System is functioning properly.
ESC operation
ESC ON condition

ON, ESC and ESC OFF indi-
cator lights illuminate for
approximately 3 seconds,
then ESC is turned on.

for at least half a second after
turning the ignition ON to turn
ESC off. (ESC OFF indicator
will illuminate). To turn the
ESC on, press the ESC OFF
button (ESC OFF indicator
light will go off).

you may hear a slight ticking
sound. This is the ESC per-
forming an automatic system
self-check and does not indi-
cate a problem.WARNING
Never drive too fast for the road
conditions or too quickly when cor-
nering. Electronic stability control
(ESC) will not prevent accidents.
Excessive speed in turns, abrupt
maneuvers and hydroplaning on
wet surfaces can still result in seri-
ous accidents. Only a safe and
attentive driver can prevent acci-
dents by avoiding maneuvers that
cause the vehicle to lose traction.
Even with ESC installed, always fol-
low all the normal precautions for
driving - including driving at safe
speeds for the conditions.
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523
Driving your vehicle
Good braking practices
Check to be sure the parking brake is
not engaged and that the parking brake
indicator light is out before driving away. Driving through water may get the
brakes wet. They can also get wet when
the car is washed. Wet brakes can be
dangerous! Your car will not stop as
quickly if the brakes are wet. Wet brakes
may cause the car to pull to one side.
To dry the brakes, apply the brakes light-
ly until the braking action returns to nor-
mal, taking care to keep the car under
control at all times. If the braking action
does not return to normal, stop as soon
as it is safe to do so and call an author-
ized HYUNDAI dealer for assistance.
Don't coast down hills with the car out of
gear. This is extremely hazardous. Keep
the car in gear at all times, use the
brakes to slow down, then shift to a
lower gear so that engine braking will
help you maintain a safe speed.
Don't "ride" the brake pedal. Resting
your foot on the brake pedal while driv-
ing can be dangerous because it can
result in the brakes overheating and los-
ing their effectiveness. It also increases
the wear of the brake components.
If a tire goes flat while you are driving,
apply the brakes gently and keep the car
pointed straight ahead while you slow
down. When you are moving slowly
enough for it to be safe to do so, pull off
the road and stop in a safe place. If your vehicle is equipped with an auto-
matic transaxle, don't let your vehicle
creep forward. To avoid creeping for-
ward, keep your foot firmly on the brake
pedal when the vehicle is stopped.
Use caution when parking on a hill.
Firmly engage the parking brake and
place the shift lever in P position. If your
vehicle is facing downhill, turn the front
wheels into the curb to help keep the
vehicle from rolling. If your vehicle is fac-
ing uphill, turn the front wheels away
from the curb to help keep the vehicle
from rolling. If there is no curb or if it is
required by other conditions to keep the
vehicle from rolling, block the wheels.
Under some conditions your parking
brake can freeze in the engaged posi-
tion. This is most likely to happen when
there is an accumulation of snow or ice
around or near the rear brakes or if the
brakes are wet. If there is a risk that the
parking brake may freeze, apply it only
temporarily while you put the gear
selector lever in P positionand block
the rear wheels so the vehicle cannot
roll. Then release the parking brake.
Do not hold the vehicle on the upgrade
with the accelerator pedal. This can
cause the transaxle to overheat. Always
use the brake pedal or parking brake.
WARNING
Whenever you leave or park your
vehicle, always firmly set the
parking brake as far as possible
and fully engage the vehicle's
transaxle into the P (Park) posi-
tion. If the parking brake is not
fully engaged, the vehicle may
move inadvertently and injure
yourself and others.
All vehicles should always have
the parking brake fully engaged
when parking to avoid inadver-
tent movement of the vehicle
which can injure occupants or
pedestrians.
CAUTION
Do not depress the brake pedal con-
tinuously without READY status. The
battery may be discharged.

Driving your vehicle
28 5
Your vehicle's fuel economy depends
mainly on your style of driving, where you
drive and when you drive.
Each of these factors affects how many
miles (kilometers) you can get from a gal-
lon (liter) of fuel. To operate your vehicle
as economically as possible, use the fol-
lowing driving suggestions to help save
money in both fuel and repairs:
Drive smoothly. Accelerate at a moder-
ate rate. Don't make "jack-rabbit" starts
or full-throttle shifts and maintain a
steady cruising speed. Don't race
between stoplights. Try to adjust your
speed to that of the other traffic so you
don't have to change speeds unneces-
sarily. Avoid heavy traffic whenever
possible. Always maintain a safe dis-
tance from other vehicles so you can
avoid unnecessary braking. This also
reduces brake wear.
Drive at a moderate speed. The faster
you drive, the more fuel your car uses.
Driving at a moderate speed, especial-
ly on the highway, is one of the most
effective ways to reduce fuel consump-
tion. Don't "ride" the brake pedal. This can
increase fuel consumption and also
increase wear on these components.
In addition, driving with your foot rest-
ing on the brake pedal may cause the
brakes to overheat, which reduces
their effectiveness and may lead to
more serious consequences.
Take care of your tires. Keep them
inflated to the recommended pressure.
Incorrect inflation, either too much or
too little, results in unnecessary tire
wear. Check the tire pressures at least
once a month.
Be sure that the wheels are aligned
correctly. Improper alignment can
result from hitting curbs or driving too
fast over irregular surfaces. Poor align-
ment causes faster tire wear and may
also result in other problems as well as
greater fuel consumption. Keep your car in good condition. For
better fuel economy and reduced
maintenance costs, maintain your car
in accordance with the maintenance
schedule in section 7. If you drive your
car in severe conditions, more frequent
maintenance is required (see section 7
for details).
Keep your car clean. For maximum
service, your vehicle should be kept
clean and free of corrosive materials. It
is especially important that mud, dirt,
ice, etc. not be allowed to accumulate
on the underside of the car. This extra
weight can result in increased fuel con-
sumption and also contribute to corro-
sion.
Travel lightly. Don't carry unnecessary
weight in your car. Weight reduces fuel
economy.
Don't let the engine idle longer than
necessary. If you are waiting (and not
in traffic), turn off your engine and
restart only when you're ready to go.
ECONOMICAL OPERATION