2018 BUICK ENCORE check engine light

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11354409) - 2018 - crc - 11/8/17
194 Driving and Operating
Caution (Continued)
.Fuel containing metals such
as methylcyclopentadienyl
manganese tricarbonyl
(MMT), which can damage
the emissions control
system and spark plugs.
. Fuel with a posted octane
rating of less than the
recommended fuel. Using
this fuel will lower fuel
economy and performance,
and may decrease the life of
the emissions catalyst.
California Fuel
Requirements
If the vehicle is certified to meet
California Emissions Standards, it is
designed to operate on fuels that
meet California specifications. See
the underhood emission control
label. If this fuel is not available in
states adopting California Emissions
Standards, the vehicle will operate
satisfactorily on fuels meeting federal specifications, but emission
control system performance may be
affected. The malfunction indicator
lamp could turn on and the vehicle
may not pass a smog-check test.
See
Malfunction Indicator Lamp
(Check Engine Light) 0116. If this
occurs, return to your authorized
dealer for diagnosis. If it is
determined that the condition is
caused by the type of fuel used,
repairs may not be covered by the
vehicle warranty.
Fuels in Foreign
Countries
The U.S., Canada, and Mexico post
fuel octane ratings in anti-knock
index (AKI). For fuel not to use in a
foreign country, see “Prohibited
Fuels” inFuel 0193.
Fuel Additives
To keep fuel systems clean, TOP
TIER detergent gasoline is
recommended. See Fuel0193. If TOP TIER detergent gasoline is
not available, one bottle of GM Fuel
System Treatment Cleaner added to
the fuel tank at every engine oil
change, can help. GM Fuel System
Treatment Cleaner is the only
gasoline additive recommended by
General Motors. It is available at
your dealer.
Filling the Tank
{Warning
Fuel vapors and fuel fires burn
violently and can cause injury or
death.
. To help avoid injuries to you
and others, read and follow
all the instructions on the
fuel pump island.
. Turn off the engine when
refueling.
. Keep sparks, flames, and
smoking materials away
from fuel.
(Continued)

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11354409) - 2018 - crc - 11/8/17
Driving and Operating 197
Trailer Towing
General Towing
Information
The vehicle is neither designed nor
intended to tow a trailer.
Conversions and
Add-Ons
Add-On Electrical
Equipment
{Warning
The Data Link Connector (DLC) is
used for vehicle service and
Emission Inspection/Maintenance
testing. SeeMalfunction Indicator
Lamp (Check Engine Light) 0116.
A device connected to the DLC —
such as an aftermarket fleet or
driver-behavior tracking device —
may interfere with vehicle
systems. This could affect vehicle
operation and cause a crash.
Such devices may also access
information stored in the vehicle’s
systems.
Caution
Some electrical equipment can
damage the vehicle or cause
components to not work and
would not be covered by the
vehicle warranty. Always check
with your dealer before adding
electrical equipment.
Add-on equipment can drain the
vehicle's 12-volt battery, even if the
vehicle is not operating.
The vehicle has an airbag system.
Before attempting to add anything
electrical to the vehicle, see
Servicing the Airbag-Equipped
Vehicle 076 and Adding Equipment
to the Airbag-Equipped Vehicle
0 76.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11354409) - 2018 - crc - 11/8/17
198 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . 199
California Proposition65 Warning . . . . . . . . . . . . . . . . . 199
California Perchlorate Materials Requirements . . . . . 200
Accessories and Modifications . . . . . . . . . . . . . . . . 200
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 200
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 201
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 203
Engine Oil . . . . . . . . . . . . . . . . . . . . 206
Engine Oil Life System . . . . . . . 209
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 210
Engine Air Cleaner/Filter . . . . . . 210
Cooling System . . . . . . . . . . . . . . . 211
Engine Overheating . . . . . . . . . . 215
Washer Fluid . . . . . . . . . . . . . . . . . 216
Brakes . . . . . . . . . . . . . . . . . . . . . . . 217
Brake Fluid . . . . . . . . . . . . . . . . . . . 218
Battery - North America . . . . . . 219
All-Wheel Drive . . . . . . . . . . . . . . . 219 Starter Switch Check . . . . . . . . . 220
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 220
Park Brake and P (Park)
Mechanism Check . . . . . . . . . . 220
Wiper Blade Replacement . . . . 221
Windshield Replacement . . . . . 222
Gas Strut(s) . . . . . . . . . . . . . . . . . . 222
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 224
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 224
Halogen Bulbs . . . . . . . . . . . . . . . . 224
LED Lighting . . . . . . . . . . . . . . . . . 224
Headlamps, Front Turn Signal and Parking Lamps . . . . . . . . . 224
Taillamps, Turn Signal, Sidemarker, Stoplamps, and
Back-Up Lamps . . . . . . . . . . . . . 225
License Plate Lamp . . . . . . . . . . 227
Electrical System
Electrical System Overload . . . 227
Fuses and Circuit Breakers . . . 228
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 228
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 232 Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 234
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 235
All-Season Tires . . . . . . . . . . . . . . 236
Winter Tires . . . . . . . . . . . . . . . . . . 236
Summer Tires . . . . . . . . . . . . . . . . 237
Tire Sidewall Labeling . . . . . . . . 237
Tire Designations . . . . . . . . . . . . . 239
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 240
Tire Pressure . . . . . . . . . . . . . . . . . 242
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 244
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 245
Tire Inspection . . . . . . . . . . . . . . . . 248
Tire Rotation . . . . . . . . . . . . . . . . . 248
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 249
Buying New Tires . . . . . . . . . . . . . 250
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 251
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 252
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 253
Wheel Replacement . . . . . . . . . . 253
Tire Chains . . . . . . . . . . . . . . . . . . . 254
If a Tire Goes Flat . . . . . . . . . . . . 254

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11354409) - 2018 - crc - 11/8/17
210 Vehicle Care
If the CHANGE ENGINE OIL SOON
DIC message comes back on when
the vehicle is started, the engine oil
life system has not reset. Repeat
the procedure.
Automatic Transmission
Fluid
How to Check Automatic
Transmission Fluid
It is not necessary to check the
transmission fluid level.
A transmission fluid leak is the only
reason for fluid loss. If a leak
occurs, take the vehicle to your
dealer and have it repaired as soon
as possible.
There is a special procedure for
checking and changing the
transmission fluid. Because this
procedure is difficult, you should
have this done at your dealer.
Change the fluid at the intervals
listed inMaintenance Schedule
0 278, and be sure to use the fluid
listed in Recommended Fluids and
Lubricants 0286.
Engine Air Cleaner/Filter
The engine air cleaner/filter is in the
engine compartment on the
passenger side of the vehicle. See
Engine Compartment Overview
0203.
When to Inspect the Engine Air
Cleaner/Filter
For intervals on changing and
inspecting the engine air cleaner/
filter, see Maintenance Schedule
0 278.
How to Inspect the Engine Air
Cleaner/Filter
Do not start the engine or have the
engine running with the engine air
cleaner/filter housing open. Before
removing the engine air cleaner/
filter, make sure that the engine air
cleaner/filter housing and nearby
components are free of dirt and
debris. Remove the engine air
cleaner/filter. Lightly tap and shake
the engine air cleaner/filter (away
from the vehicle), to release loose
dust and dirt. Inspect the engine air
cleaner/filter for damage, and replace if damaged. Do not clean
the engine air cleaner/filter with
water or compressed air.
To inspect or replace the air cleaner/
filter:
1.4L L4 Engine (LE2)

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11354409) - 2018 - crc - 11/8/17
218 Vehicle Care
Brake Fluid
The brake master cylinder reservoir
is filled with GM approved DOT 4
brake fluid as indicated on the
reservoir cap. SeeEngine
Compartment Overview 0203 for
the location of the reservoir.
Checking Brake Fluid
With the vehicle in P (Park) on a
level surface, the brake fluid level
should be between the minimum
and maximum marks on the brake
fluid reservoir.
There are only two reasons why the
brake fluid level in the reservoir may
go down:
. Normal brake lining wear. When
new linings are installed, the
fluid level goes back up. .
A fluid leak in the brake
hydraulic system. Have the
brake hydraulic system fixed.
With a leak, the brakes will not
work well.
Always clean the brake fluid
reservoir cap and the area around
the cap before removing it.
Do not top off the brake fluid.
Adding fluid does not correct a leak.
If fluid is added when the linings are
worn, there will be too much fluid
when new brake linings are
installed. Add or remove fluid, as
necessary, only when work is done
on the brake hydraulic system.
{Warning
If too much brake fluid is added, it
can spill on the engine and burn,
if the engine is hot enough. You
or others could be burned, and
the vehicle could be damaged.
Add brake fluid only when work is
done on the brake hydraulic
system. When the brake fluid falls to a low
level, the brake warning light comes
on. See
Brake System Warning
Light 0118.
Brake fluid absorbs water over time
which degrades the effectiveness of
the brake fluid. Replace brake fluid
at the specified intervals to prevent
increased stopping distance. See
Maintenance Schedule 0278.
What to Add
Use only GM approved DOT 4
brake fluid from a clean, sealed
container. See Recommended
Fluids and Lubricants 0286.
{Warning
The wrong or contaminated brake
fluid could result in damage to the
brake system. This could result in
the loss of braking leading to a
possible injury. Always use the
proper GM approved brake fluid.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11354409) - 2018 - crc - 11/8/17
262 Vehicle Care
2. Discharged Battery PositiveTerminal
3. Good Battery Negative Terminal
4. Good Battery Positive Terminal
The jump start negative grounding
point (1) for the discharged battery
is the engine block or an engine
mounting bolt. Connect to a spot as
far away from the discharged
battery as possible.
The jump start positive terminal (2)
on the discharged battery is in the
engine compartment on the driver
side of the vehicle.
The jump start negative terminal (3)
and positive terminal (4) are on the
battery of the vehicle providing the
jump start.
The positive jump start connection
for the discharged battery is under a
trim cover. Open the cover to
expose the terminal.
1. Check the other vehicle. It must have a 12-volt battery
with a negative ground system.
Caution
If the other vehicle does not have
a 12-volt system with a negative
ground, both vehicles can be
damaged. Only use a vehicle that
has a 12-volt system with a
negative ground for jump starting.
2. Position the two vehicles so that they are not touching.
3. Set the parking brake firmly and put the shift lever in
P (Park) with an automatic
transmission, or Neutral with a
manual transmission.
Caution
If any accessories are left on or
plugged in during the jump
starting procedure, they could be
damaged. The repairs would not
be covered by the vehicle
warranty. Whenever possible, turn
off or unplug all accessories on
either vehicle when jump starting. 4. Turn the ignition off. Turn off all
lights and accessories in both
vehicles, except the hazard
warning flashers if needed.
{Warning
An electric fan can start up even
when the engine is not running
and can injure you. Keep hands,
clothing, and tools away from any
underhood electric fan.
{Warning
Using a match near a battery can
cause battery gas to explode.
People have been hurt doing this,
and some have been blinded.
Use a flashlight if you need more
light.
Battery fluid contains acid that
can burn you. Do not get it on
you. If you accidentally get it in
your eyes or on your skin, flush
the place with water and get
medical help immediately.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11354409) - 2018 - crc - 11/8/17
284 Service and Maintenance
.To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power.
. Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion-free.
Belts
. Belts may need replacing if they
squeak or show signs of
cracking or splitting.
. Trained dealer technicians have
access to tools and equipment
to inspect the belts and
recommend adjustment or
replacement when necessary.
Brakes
Brakes stop the vehicle and are
crucial to safe driving.
. Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping. .
Trained dealer technicians have
access to tools and equipment
to inspect the brakes and
recommend quality parts
engineered for the vehicle.
Fluids
Proper fluid levels and approved
fluids protect the vehicle’s systems
and components. See
Recommended Fluids and
Lubricants 0286 for GM approved
fluids.
. Engine oil and windshield
washer fluid levels should be
checked at every fuel fill.
. Instrument cluster lights may
come on to indicate that fluids
may be low and need to be
filled.
Hoses
Hoses transport fluids and should
be regularly inspected to ensure
that there are no cracks or leaks.
With a multi-point inspection, your
dealer can inspect the hoses and
advise if replacement is needed. Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.
Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage.
The brake lamps need to be
checked periodically to ensure
that they light when braking.
. With a multi-point inspection,
your dealer can check the lamps
and note any concerns.
Shocks and Struts
Shocks and struts help aid in control
for a smoother ride.
. Signs of wear may include
steering wheel vibration, bounce/
sway while braking, longer
stopping distance, or uneven
tire wear.
. As part of the multi-point
inspection, trained dealer
technicians can visually inspect
the shocks and struts for signs

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11354409) - 2018 - crc - 11/8/17
318 Index
IndexA
About Driving the Vehicle . . . . . . . . . 2
Accessories andModifications . . . . . . . . . . . . . . . . . . 200
Accessory Power . . . . . . . . . . . . . . . 171
Add-On Electrical Equipment . . . 197
Additional Information
OnStar . . . . . . . . . . . . . . . . . . . . . . . 312
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . 283
Adjustments Lumbar, Front Seats . . . . . . . . . . . . 50
Air Cleaner/Filter, Engine . . . . . . . 210
Air Conditioning . . . . . . . . . . . 145, 148
Air Filter, Passenger Compartment . . . . . . . . . . . . . . . . . 152
Air Intake . . . . . . . . . . . . . . . . . . . . . . . 152
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 152
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . 77
How Does an AirbagRestrain? . . . . . . . . . . . . . . . . . . . . . 70
Passenger Sensing System . . . . 72
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 70
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . . 70 Airbag System (cont'd)
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 69
Where Are the Airbags? . . . . . . . . 67
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . 76
Passenger Status Indicator . . . .115
Readiness Light . . . . . . . . . . . . . . .115
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . 76
System Check . . . . . . . . . . . . . . . . . . 66
Alarm Vehicle Security . . . . . . . . . . . . . . . . 39
Alert Side Blind Zone (SBZA) . . . . . . 190
All-Season Tires . . . . . . . . . . . . . . . . 236
All-Wheel Drive . . . . . . . . . . . . 178, 219
Antilock Brake System (ABS) . . . 178 Warning Light . . . . . . . . . . . . . . . . . .119
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . 267
Interior . . . . . . . . . . . . . . . . . . . . . . . . 271
Armrest Front Seat . . . . . . . . . . . . . . . . . . . . . . 53
Rear Seat . . . . . . . . . . . . . . . . . . . . . . 59
Assistance Program, Roadside . . . . . . . . . . . . . . . . . . . . . . 296