2016 SUBARU IMPREZA check engine light

Fuel
CAUTION
Use of a fuel which is low in quality
or use of an inappropriate fuel
additive may cause damage to the
engine and/or fuel system.
&Fuel requirements
The engine is designed to operate using
unleaded gasoline with an octane rating
of 87 AKI (90 RON) or higher .
! Fuel octane rating
Using a gasoline with a lower octane
rating can cause persistent and heavy
knocking, which can damage the engine.
Do not be concerned if your vehicle
sometimes knocks lightly when you drive
up a hill or when you accelerate. Contact
your SUBARU dealer if you use a fuel with
the specified octane rating and your
vehicle knocks heavily or persistently.
!RON
This octane rating is the Research Octane
Number. !
AKI
This octane rating is the average of the
Research Octane and Motor Octane
numbers and is commonly referred to as
the Anti Knock Index (AKI).
! Unleaded gasoline
The neck of the fuel filler pipe is designed
to accept only an unleaded gasoline filler
nozzle. Under no circumstances should
leaded gasoline be used because it will
damage the emission control system and
may impair driveability and fuel economy.
! Gasoline for California-certified
LEV
If your vehicle was certified to California ’s
low emission vehicle (LEV) standards as
indicated on the underhood tune-up label,
it is designed to optimize engine and
emission performance with gasoline that
meets the clean burning low-sulfur Cali-
fornia gasoline specifications. If you live in
any other state than California, your
vehicle will operate on gasoline meeting
Federal specifications. Gasoline sold out-
side California is permitted to have higher
sulfur levels, which may affect the perfor-
mance of your vehicle’ s catalytic converter
and may produce a sulfur exhaust odor or
smell. SUBARU recommends that you try
a different brand of unleaded gasoline
having lower sulfur to determine if the problem is fuel related before returning
your vehicle to an authorized dealer for
service.
!
MMT
Some gasoline contains an octane-en-
hancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl). If
you use such fuels, your emission control
system performance may deteriorate and
the CHECK ENGINE warning light/Mal-
function indicator light may turn on. If this
happens, return to your authorized
SUBARU Dealer for service. If it is
determined that the condition is caused
by the type of fuel used, repairs may not
be covered by your warranty.
! Gasoline for cleaner air
Your use of gasoline with detergent
additives will help prevent deposits from
forming in your engine and fuel system.
This helps keep your engine in tune and
your emission control system working
properly, and is a way of doing your part
for cleaner air. If you continuously use a
high quality fuel with the proper detergent
and other additives, you should never
need to add any fuel system cleaning
agents to your fuel tank.
Many gasolines are now blended with
materials called oxygenates. Use of these
fuels can also help keep the air cleaner.
Starting and operating/Fuel
–CONTINUED –7-3

Starting and operating/Fuel
4. Set the fuel filler cap on the cap holder
inside the fuel filler lid.
WARNING
.When refueling, insert the fuel
nozzle securely into the fuel filler
pipe. If the nozzle is lifted or not
fully inserted, its automatic stop-
ping mechanism may not func-
tion, causing fuel to overflow the
tank and creating a fire hazard. .
Stop refueling when the auto-
matic stop mechanism on the
fuel nozzle activates. If you con-
tinue to add fuel, temperature
changes or other conditions
may cause fuel to overflow from
the tank and create a fire hazard.
5. Stop filling the tank after the fuel filler
pump automatically stops. Do not add any
more fuel.
6. Put the cap back on, turn it clockwise
until you hear a clicking noise. Be certain
not to catch the tether under the cap while
tightening.
CAUTION
Make sure that the cap is tightened
until it clicks to prevent fuel spillage
in the event of an accident.
7. Close the fuel filler lid completely.
CAUTION
If you spill any fuel on the painted
surface, rinse it off immediately.
Otherwise, the painted surface
could be damaged.
NOTE
. You will see the “”sign in the fuel
gauge. This indicates that the fuel filler
door (lid) is located on the right side of
the vehicle.
. If the fuel filler cap is not tightened
until it clicks or if the tether is caught
under the cap, the CHECK ENGINE
warning light/malfunction indicator
light may illuminate. Refer to “CHECK
ENGINE warning light/Malfunction in-
dicator light ”F 3-16.
CAUTION
. Never add any cleaning agents to
the fuel tank. The addition of a
cleaning agent may cause da-
mage to the fuel system.
. After refueling, turn the cap to the
right until it clicks to ensure that
it is fully tightened. If the cap is
not securely tightened, fuel may
leak out while the vehicle is being
driven or fuel spillage could
occur in the event of an accident,
creating a fire hazard.
. Do not let fuel spill on the exterior
surfaces of the vehicle. Because
fuel may damage the paint, be
sure to wipe off any spilled fuel
quickly. Paint damage caused by
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spilled fuel is not covered under
the SUBARU Limited Warranty.
. Always use a genuine SUBARU
fuel filler cap. If you use the
wrong cap, it may not fit or have
proper venting and your fuel tank
and emission control system
may be damaged. It could also
lead to fuel spillage and a fire.
. Immediately put fuel in the tank
whenever the low fuel warning
light illuminates. Engine misfires
as a result of an empty tank
could cause damage to the en-
gine. Continuing to operate your
vehicle at an extremely low fuel
level may result in a reduction of
engine performance.State emission testing
(U.S. only)
WARNING
Testing of an All-Wheel Drive model
must NEVER be performed on a
single two-wheel dynamometer. At-
tempting to do so will result in
uncontrolled vehicle movement and
may cause an accident or injuries to
persons nearby.
CAUTION
. At state inspection time, remem-
ber to tell your inspection or
service station in advance not to
place your SUBARU AWD vehicle
on a two-wheel dynamometer.
Otherwise, serious transmission
damage will result.
. Resultant vehicle damage due to
improper testing is not covered
under the SUBARU Limited War-
ranty and is the responsibility of
the state inspection program or
its contractors or licensees.
California and a number of federal states have Inspection/Maintenance programs to
inspect your vehicle
’s emission control
system. If your vehicle does not pass this
test, some states may deny renewal of
your vehicle’ s registration.
Your vehicle is equipped with a computer
that monitors the performance of the
engine’ s emission control system. Certi-
fied emission inspectors will inspect the
On-Board Diagnostic (OBDII) system as
part of the state emission inspection
process. The OBDII system is designed
to detect engine and transmission pro-
blems that might cause the vehicle emis-
sions to exceed allowable limits. OBDII
inspections apply to all 1996 model year
and newer passenger cars and trucks.
Over 30 states plus the District of Colum-
bia have implemented emission inspec-
tion of the OBDII system.
. The inspection of the OBDII system
consists of a visual operational check of
the “CHECK ENGINE ”warning light/mal-
function indicator light (MIL) and an
examination of the OBDII system with an
electronic scan tool.
. A vehicle
passes the OBDII system
inspection if proper operation of the
“ CHECK ENGINE ”warning light is ob-
served, there are no stored diagnostic
trouble codes, and the OBDII readiness
monitors are all complete.
Starting and operating/State emission testing (U.S. only)
–CONTINUED –7-7

Starting and operating/Preparing to drive
.A vehiclefails the OBDII inspection if
the “CHECK ENGINE ”warning light is not
properly operating (light is illuminated or is
not working due to a burned out bulb) or
there is one or more diagnostic trouble
codes stored in the vehicle’ s computer.
. A state emission inspection may reject
(not pass or fail) a vehicle if the number of
OBDII system readiness monitors “NOT
READY ”is greater than one. If the
vehicle’ s battery has been recently re-
placed or disconnected, the OBDII system
inspection may indicate that the vehicle is
not ready for the emission test. Under this
condition, the vehicle driver should be
instructed to drive his/her vehicle for a few
days to reset the readiness monitors and
return for an emission re-inspection.
. Owners of rejected or failing vehicles
should contact their SUBARU Dealer for
service.
Some states still use dynamometers in
their emission inspection program. A
dynamometer is a treadmill or roller-like
testing device that allows your vehicle ’s
wheels to turn while the vehicle remains in
one place. Prior to your vehicle being put
on a dynamometer, tell your emission
inspector
not to place your SUBARU
AWD vehicle on a two-wheel dynam-
ometer. Otherwise, serious transmis-
sion damage will result. The U.S. Environmental Protection
Agency (EPA) and states using two-wheel
dynamometers in their emission testing
program have EXEMPTED SUBARU
AWD vehicles from the portion of the
testing program that involves a two-wheel
dynamometer. There are some states that
use four-wheel dynamometers in their
testing program. When properly used, this
equipment should not damage a SUBARU
AWD vehicle.
Under no circumstances should the rear
wheels be jacked off the ground, nor
should the driveshaft be disconnected for
state emission testing.
Preparing to drive
You should perform the following checks
and adjustments every day before you
start driving.
1. Check that all windows, mirrors, and
lights are clean and unobstructed.
2. Check the appearance and condition
of the tires. Also check tires for proper
inflation.
3. Look under the vehicle for any sign of
leaks.
4. Check that the hood, trunk (4-door)
and rear gate (5-door) are fully closed.
5. Check the adjustment of the seat.
6. Check the adjustment of the inside
and outside mirrors.
7. Fasten your seatbelt. Check that your
passengers have fastened their seatbelts.
8. Check the operation of the warning
and indicator lights when the ignition
switch is turned to the
“ON ”position.
9. Check the gauges, indicator and warn-
ing lights after starting the engine.
10. Check that no small animals enter the
engine compartment.
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Starting and operating/Starting and stopping the engine (models without push–button start system)
. When starting the engine, be sure
to sit in the driver ’s seat (except
when using the remote engine
start system).
NOTE
. Avoid rapid racing and rapid accel-
eration immediately after the engine
has started.
. For a short time after the engine has
started, the engine speed is kept high.
When the warm-up is completed, the
engine speed lowers automatically.
. On rare occasions, it may be difficult
to start the engine depending on the
fuel and the usage condition (repeated
driving of a distance in which the
engine has not warmed up sufficiently).
In such a case, it is recommended that
you change to a different brand of fuel.
. On rare occasions, transient knock-
ing may be heard from the engine when
the accelerator is operated rapidly
such as a rapid start-up and a rapid
acceleration. This is not a malfunction.
. The engine starts more easily when
the headlights, air conditioner and rear
window defogger are turned off.
. After the engine starts, the engine
speed will be kept high until the engine
has warmed up sufficiently. !
MT models
1. Apply the parking brake.
2. Turn off unnecessary lights and ac-
cessories.
3. Depress the clutch pedal to the floor
and shift the shift lever into neutral. Hold
the clutch pedal to the floor while starting
the engine.
The starter motor will only operate when
the clutch pedal is depressed fully to the
floor.
4. Turn the ignition switch to the “ON”
position and check the operation of the
warning and indicator lights. Refer to
“Warning and indicator lights ”F 3-13.
5. Turn the ignition switch to the “START”
position without depressing the accelera-
tor pedal. Release the key immediately
after the engine has started.
If the engine does not start, try the
following procedure.
(1) Turn the ignition switch to the
“LOCK” /“OFF ”position and wait for at
least 10 seconds. After checking that
the parking brake is firmly set, turn the
ignition switch to the “START”position
while depressing the accelerator pedal
slightly (approximately a quarter of the
full stroke). Release the accelerator
pedal as soon as the engine starts.
(2) If this fails to start the engine, turn the ignition switch back to the
“LOCK”/
“ OFF ”position and wait for at least 10
seconds. Then fully depress the accel-
erator pedal and turn the ignition
switch to the “START”position. If the
engine starts, quickly release the
accelerator pedal.
(3) If this fails to start the engine, turn
the ignition switch again to the
“LOCK ”/“OFF ”position. After waiting
for 10 seconds or longer, turn the
ignition switch to the “START ”position
without depressing the accelerator
pedal.
(4) If the engine still refuses to start,
contact your nearest SUBARU dealer
for assistance.
6. Confirm that all warning and indicator
lights have turned off after the engine has
started. The fuel injection system auto-
matically lowers the idle speed as the
engine warms up.
! CVT models
1. Apply the parking brake.
2. Turn off unnecessary lights and ac-
cessories.
3. Shift

the select lever to the “P”or “N”
position (preferably the “P ”position).
The starter motor will only operate when
the select lever is at the “P ”or “N”position.
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4. Turn the ignition switch to the“ON”
position and check the operation of the
warning and indicator lights. Refer to
“Warning and indicator lights ”F 3-13.
5. Turn the ignition switch to the “START”
position without depressing the accelera-
tor pedal. Release the key immediately
after the engine has started.
If the engine does not start, try the
following procedure.
(1) Turn the ignition switch to the
“LOCK”/ “OFF”position and wait for at
least 10 seconds. After checking that
the parking brake is firmly set, turn the
ignition switch to the “START”position
while depressing the accelerator pedal
slightly (approximately a quarter of the
full stroke). Release the accelerator
pedal as soon as the engine starts.
(2) If this fails to start the engine, turn
the ignition switch back to the “LOCK”/
“OFF ”position and wait for at least 10
seconds. Then fully depress the accel-
erator pedal and turn the ignition
switch to the “START ”position. If the
engine starts, quickly release the
accelerator pedal.
(3) If this fails to start the engine, turn
theignitionswitchagaintothe
“LOCK”/ “OFF”position. After waiting
for 10 seconds or longer, turn the
ignition switch to the “START”position without depressing the accelerator
pedal.
(4) If the engine still refuses to start,
contact your nearest SUBARU dealer
for assistance.
6. Confirm that all warning and indicator
lights have turned off after the engine has
started. The fuel injection system auto-
matically lowers the idle speed as the
engine warms up.
While the engine is warming up, make
sure that the select lever is at the “P”or
“N ”position and that the parking brake is
applied.
CAUTION
If you restart the engine while the
vehicle is moving, shift the select
lever into the “N”position. Do not
attempt to place the select lever of a
moving vehicle into the “P”posi-
tion.
& Stopping the engine
The ignition switch should be turned off
only when the vehicle is stopped and the
engine is idling.
WARNING
Do not stop the engine when the
vehicle is moving. This will cause
loss of power to the power steering
and the brake booster, making steer-
ing and braking more difficult. It
could also result in accidental acti-
vation of the “LOCK”/“OFF ”posi-
tion on the ignition switch, causing
the steering wheel to lock.
Starting and operating/Starting and stopping the engine (models without push –button start system)7-11

Starting and operating/Remote engine start system (dealer option)
&Models without “keyless ac-
cess with push-button start
system ”
Remote engine starter transceiver (fob)
1) Fob button
!Starting the engine
NOTE
All vehicle doors (including rear gate/
trunk lid) and the engine hood must be
closed prior to activating the remote
engine start system. Any open entry
point will prevent starting or cause the
engine to stop.
The remote engine start system is acti-
vated by pressing the fob button on your
remote engine starter transceiver (fob)
twice within 3 seconds. If the fob is within operating range of the system and the
start request is received, the following
phenomena will occur.
.
The fob flashes and beeps once.
. The horn sounds once.
. The side marker lights, tail lights, and
parking lights flash once.
If the fob is not within range (the user is
too far away from the vehicle), the fob will
indicate two long flashes without beeping.
The system will check certain safety
preconditions before starting, and if all
conditions are met, the engine will start
within 5 seconds. After the engine starts,
the following phenomena will occur.
. The fob flashes and beeps twice.
. The horn sounds once.
. The side marker lights, tail lights, and
parking lights flash once.
While the engine is idling via the remote
engine start system, the following phe-
nomena will occur.
. The side marker lights, tail lights, and
parking lights remain illuminated.
. The fob button flashes once every 3
seconds.
. The power windows are disabled.
If the engine turns over but does not start
(or starts and stalls) the remote engine start system will power off and then
attempt to start the engine 3 additional
times. The system will not attempt to
restart the engine if it determines a vehicle
malfunction is preventing starting. If the
engine does not start after 3 additional
attempts, the remote engine start request
will be aborted.
!
Stopping the engine
Press and hold the fob button for at least 2
seconds to stop the engine. The fob will
flash and beep three times, indicating the
engine has stopped. If the stop request is
not received (for example, if the user is too
far away from the vehicle), the fob will
continue to flash once every 3 seconds.
The system will automatically stop the
engine after 15 minutes.
! Remote start safety features
For safety and security reasons, the
remote engine start system will prevent
starting (or stop the engine if running) and
sound the horn twice if any of the following
conditions is detected. In addition, the fob
will flash and beep 3 times.
. The brake pedal is depressed
. A key is in the ignition switch
. The engine hood is open
. The remote start system “Service
mode ”is engaged
. The engine idle speed exceeds 3,500
7-16

Starting and operating/ABS (Anti–lock Brake System)
cate any malfunctions, and the brake
assist system is operating properly.
. You might feel that the brake pedal
is applied by lighter force and gener-
ates a greater braking force.
. You might hear an ABS operating
noise from the engine compartment.
& Disc brake pad wear warning
indicators
The disc brake pad wear warning indica-
tors on the disc brakes give a warning
noise when the brake pads are worn.
If a squeaking or scraping noise is heard
from the disc brakes while braking, im-
mediately have your vehicle checked by
your SUBARU dealer.
ABS (Anti-lock Brake Sys-
tem)
The ABS prevents the lock-up of wheels
which may occur during sudden braking or
braking on slippery road surfaces. This
helps prevent the loss of steering control
and directional stability caused by wheel
lock-up.
When the ABS is operating, you may hear
a chattering noise or feel a slight vibration
in the brake pedal. This is normal when
the ABS operates.
The ABS will not operate when the vehicle
speed is below approximately 6 mph (10
km/h).
WARNING
Always use the utmost care in
driving –overconfidence because
you are driving a vehicle with the
ABS could easily lead to a serious
accident.
CAUTION
. The ABS does not always de-
crease stopping distance. You
should always maintain a safe following distance from other
vehicles.
. When driving on badly surfaced
roads, gravel roads, icy roads, or
over deep newly fallen snow,
stopping distances may be long-
er for a vehicle with the ABS than
one without. When driving under
these conditions, therefore, re-
duce your speed and leave ample
distance from other vehicles.
. When tire chains are installed,
stopping distances may be long-
er for a vehicle with the ABS than
one without. Be sure to reduce
your speed and maintain a safe
distance from the vehicle in front.
. When you feel the ABS operating,
you should maintain constant
brake pedal pressure. Do not
pump the brake pedal since
doing so may defeat the opera-
tion of the ABS.
& ABS self-check
Just after the vehicle is started, you may
feel on the brake pedal a vibration similar
to when the ABS operates, and you may
also hear the sound of the ABS working
from the engine compartment. This is
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