check engine light BUICK LACROSSE 2017 Owner's Manual

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
In Brief 7
1.Air Vents 0160.
2. Exterior Lamp Controls 0148.
Fog Lamps 0151.
Instrument Panel Illumination
Control 0152.
3. Turn and Lane-Change Signals
0151.
4. Tap Shift Controls (If Equipped). See Manual Mode
0 185.
5. Instrument Cluster 0108.
Driver Information Center (DIC)
Display. See Driver Information
Center (DIC) 0122.
6. Windshield Wiper/Washer
0102.
7. Hazard Warning Flashers
0150.
8. Light Sensor. See Automatic
Headlamp System 0149.
9. Infotainment 0155.
10. Dual Automatic Climate Control
System 0156.
11. Traction Control/Electronic
Stability Control 0190. Parking Assist Button. See
Driver Assistance Systems
0
202.
SPORT Button (If Equipped).
See Selective Ride Control
0 192.
Lane Keep Assist (LKA) 0215
(If Equipped).
Automatic Parking Assist
Button (If Equipped). See
Driver Assistance Systems
0 202.
12. Shift Lever. See Automatic
Transmission 0181.
13. ENGINE START/STOP Button (Out of View). See Ignition
Positions 0173.
14. Steering Wheel Controls. See the infotainment manual.
Driver Information Center (DIC)
Controls. See Driver
Information Center (DIC) 0122.
15. Horn 0102.
16. Steering Wheel Adjustment
0101 (Out of View). 17.
Cruise Control 0192 (If
Equipped).
Adaptive Cruise Control 0194
(If Equipped).
Forward Collision Alert (FCA)
System 0207 (If Equipped).
Heated Steering Wheel 0102
(If Equipped).
18. Head-Up Display (HUD) 0125
(If Equipped).
19. Hood Release (Out of View). SeeHood 0229.
20. Front Storage.
21. Data Link Connector (DLC) (Out of View). See Malfunction
Indicator Lamp (Check Engine
Light) 0114.
22. Electric Parking Brake 0187.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
100 Instruments and Controls
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . 101
Steering Wheel Controls . . . . . . 102
Heated Steering Wheel . . . . . . . 102
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Windshield Wiper/Washer . . . . 102
Compass . . . . . . . . . . . . . . . . . . . . . 103
Clock . . . . . . . . . . . . . . . . . . . . . . . . . 103
Power Outlets . . . . . . . . . . . . . . . . 104
Wireless Charging . . . . . . . . . . . . 106
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . 107
Instrument Cluster . . . . . . . . . . . . 108
Speedometer . . . . . . . . . . . . . . . . . 110
Odometer . . . . . . . . . . . . . . . . . . . . . 110
Tachometer . . . . . . . . . . . . . . . . . . . 110
Fuel Gauge . . . . . . . . . . . . . . . . . . . 110
Engine Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . 111
Safety Belt Reminders . . . . . . . . 112
Airbag Readiness Light . . . . . . . 113
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . 113 Charging System Light . . . . . . . 114
Malfunction Indicator Lamp
(Check Engine Light) . . . . . . . . 114
Brake System Warning Light . . . . . . . . . . . . . . . . . . . . . . . . 116
Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . . 116
Service Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . . 117
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . 117
Lane Keep Assist (LKA) Light . . . . . . . . . . . . . . . . . . . . . . . . 117
Vehicle Ahead Indicator . . . . . . . 118
Traction Off Light . . . . . . . . . . . . . 118
StabiliTrak
®OFF Light . . . . . . . . 118
Traction Control System (TCS)/ StabiliTrak
®Light . . . . . . . . . . . . 119
Engine Coolant Temperature Warning Light . . . . . . . . . . . . . . . 119
Tire Pressure Light . . . . . . . . . . . 119
Engine Oil Pressure Light . . . . 120
Low Fuel Warning Light . . . . . . 120
Security Light . . . . . . . . . . . . . . . . . 121
High-Beam On Light . . . . . . . . . . 121
Adaptive Forward Lighting (AFL) Light . . . . . . . . . . . . . . . . . . 121
Front Fog Lamp Light . . . . . . . . . 121
Lamps On Reminder . . . . . . . . . 121
Cruise Control Light . . . . . . . . . . 122
Door Ajar Light . . . . . . . . . . . . . . . 122
Information Displays
Driver Information Center (DIC) . . . . . . . . . . . . . . . . 122
Head-Up Display (HUD) . . . . . . 125
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . 128
Battery Voltage and Charging Messages . . . . . . . . . . . . . . . . . . . 129
Brake System Messages . . . . . 129
Compass Messages . . . . . . . . . . 129
Cruise Control Messages . . . . . 130
Door Ajar Messages . . . . . . . . . . 130
Engine Cooling System Messages . . . . . . . . . . . . . . . . . . . 131
Engine Oil Messages . . . . . . . . . 131
Engine Power Messages . . . . . 132
Fuel System Messages . . . . . . . 132
Key and Lock Messages . . . . . 132
Lamp Messages . . . . . . . . . . . . . . 133
Object Detection System Messages . . . . . . . . . . . . . . . . . . . 133
Ride Control System Messages . . . . . . . . . . . . . . . . . . . 134
Airbag System Messages . . . . 135
Security Messages . . . . . . . . . . . 135
Service Vehicle Messages . . . . 135
Steering System Messages . . . . . . . . . . . . . . . . . . . 136
Starting the Vehicle Messages . . . . . . . . . . . . . . . . . . . 136

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
Instruments and Controls 107
To charge a mobile device:1. Remove all objects from the charging pocket. The system
may not charge if there are any
objects in the charging pocket.
2. With the mobile device screen facing the rear of the vehicle,
slowly insert the device into the
charging pocket until
}
appears on theVon the
infotainment display. This
indicates that the mobile device
is properly positioned and
charging. If a phone is inserted
into the pocket and
}does
not display, remove the phone
from the pocket, turn
180 degrees, and wait
three seconds before inserting
the phone into the pocket
again.
Warning Lights,
Gauges, and
Indicators
Warning lights and gauges can
signal that something is wrong
before it becomes serious enough
to cause an expensive repair or
replacement. Paying attention to the
warning lights and gauges could
prevent injury.
Some warning lights come on briefly
when the engine is started to
indicate they are working. When
one of the warning lights comes on
and stays on while driving, or when
one of the gauges shows there may
be a problem, check the section that
explains what to do. Waiting to do
repairs can be costly and even
dangerous.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
114 Instruments and Controls
problem with the lights or the
passenger sensing system. See
your dealer for service.
{Warning
If the airbag readiness light ever
comes on and stays on, it means
that something may be wrong
with the airbag system. To help
avoid injury to yourself or others,
have the vehicle serviced right
away. SeeAirbag Readiness
Light 0113 for more information,
including important safety
information.
Charging System Light
The charging system light comes on
briefly when the ignition is turned
on, but the engine is not running, as
a check to show the light is working. The light turns off when the engine
is started. If it does not, have the
vehicle serviced by your dealer.
If the light stays on, or comes on
while driving, there could be a
problem with the electrical charging
system. Have it checked by your
dealer. Driving while this light is on
could drain the battery.
If a short distance must be driven
with the light on, be sure to turn off
all accessories, such as the radio
and air conditioner.
Malfunction Indicator
Lamp (Check Engine
Light)
This light is part of the vehicle’s
emission control on-board
diagnostic system. If this light is on
while the engine is running, a
malfunction has been detected and
the vehicle may require service. The
light should come on to show that it
is working when the ignition is in
ON/RUN with the engine not
running for Key Access or in Service
Only Mode for Keyless Access. See
Ignition Positions
0173.
Malfunctions are often indicated by
the system before any problem is
noticeable. Being aware of the light
and seeking service promptly when
it comes on may prevent damage.
Caution
If the vehicle is driven continually
with this light on, the emission
control system may not work as
well, the fuel economy may be
lower, and the vehicle may not
run smoothly. This could lead to
costly repairs that might not be
covered by the vehicle warranty.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
Instruments and Controls 115
Caution
Modifications to the engine,
transmission, exhaust, intake,
or fuel system, or the use of
replacement tires that do not
meet the original tire
specifications, can cause this light
to come on. This could lead to
costly repairs not covered by the
vehicle warranty. This could also
affect the vehicle’s ability to pass
an Emissions Inspection/
Maintenance test. See
Accessories and Modifications
0228.
If the light is flashing : A
malfunction has been detected that
could damage the emission control
system and increase vehicle
emissions. Diagnosis and service
may be required.
To help prevent damage, reduce
vehicle speed and avoid hard
accelerations and uphill grades. If towing a trailer, reduce the
amount of cargo being hauled as
soon as possible.
If the light continues to flash, find a
safe place to park. Turn the vehicle
off and wait at least 10 seconds
before restarting the engine. If the
light is still flashing, follow the
previous guidelines and see your
dealer for service as soon as
possible.
If the light is on steady :
A
malfunction has been detected.
Diagnosis and service may be
required.
Check the following:
. If fuel has been added to the
vehicle using the capless funnel
adapter, make sure that it has
been removed. See “Filling the
Tank with a Portable Gas Can”
under Filling the Tank 0218.
The diagnostic system can
detect if the adapter has been
left installed in the vehicle,
allowing fuel to evaporate into
the atmosphere. A few driving
trips with the adapter removed
may turn off the light. .
Poor fuel quality can cause
inefficient engine operation and
poor driveability, which may go
away once the engine is warmed
up. If this occurs, change the
fuel brand. It may require at
least one full tank of the proper
fuel to turn the light off. See Fuel
0 217.
If the light remains on, see your
dealer.
Emissions Inspection and
Maintenance Programs
If the vehicle requires an Emissions
Inspection/Maintenance test, the
test equipment will likely connect to
the vehicle's Data Link
Connector (DLC).
The DLC is under the instrument
panel to the left of the steering
wheel. Connecting devices that are

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
Instruments and Controls 119
Traction Control System
(TCS)/StabiliTrak®Light
This light comes on briefly when the
engine is started.
If the light does not come on, have
the vehicle serviced by your dealer.
If the system is working normally,
the indicator light turns off.
If the light is on and not flashing, the
TCS and potentially the StabiliTrak
system have been disabled.
A Driver Information Center (DIC)
message may display. Check the
DIC messages to determine which
feature(s) is no longer functioning
and whether the vehicle requires
service. SeeRide Control System
Messages 0134.
If the light is on and flashing, the
TCS and/or the StabiliTrak system
is actively working. See
Traction Control/Electronic
Stability Control 0190.
Engine Coolant
Temperature Warning
Light
This light comes on briefly while
starting the vehicle.
If it does not, have the vehicle
serviced by your dealer. If the
system is working normally the
indicator light goes off.
Caution
The engine coolant temperature
warning light indicates that the
vehicle has overheated. Driving
with this light on can damage the
(Continued)
Caution (Continued)
engine and it may not be covered
by the vehicle warranty. See
Engine Overheating0239.
The engine coolant temperature
warning light comes on when the
engine has overheated.
If this happens, pull over and turn
off the engine as soon as possible.
See Engine Overheating 0239.
Tire Pressure Light
For vehicles with the Tire Pressure
Monitor System (TPMS), this light
comes on briefly when the engine is
started. It provides information
about tire pressures and the TPMS.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
120 Instruments and Controls
When the Light Is On Steady
This indicates that one or more of
the tires are significantly
underinflated.
A Driver Information Center (DIC)
tire pressure message may also
display. SeeTire Messages 0136.
Stop as soon as possible, and
inflate the tires to the pressure value
shown on the Tire and Loading
Information label. See Tire Pressure
0 261.
When the Light Flashes First and
Then Is On Steady
If the light flashes for about a minute
and then stays on, there may be a
problem with the TPMS. If the
problem is not corrected, the light
will come on at every ignition cycle.
See Tire Pressure Monitor
Operation 0264.Engine Oil Pressure Light
Caution
Lack of proper engine oil
maintenance can damage the
engine. Driving with the engine oil
low can also damage the engine.
The repairs would not be covered
by the vehicle warranty. Check
the oil level as soon as possible.
Add oil if required, but if the oil
level is within the operating range
and the oil pressure is still low,
have the vehicle serviced. Always
follow the maintenance schedule
for changing engine oil.
This light should come on briefly as
the engine is started. If it does not
come on, have the vehicle serviced
by your dealer. If the light comes on and stays on, it
means that oil is not flowing through
the engine properly. The vehicle
could be low on oil and might have
some other system problem. See
your dealer.
Low Fuel Warning Light
This light is near the fuel gauge and
comes on briefly when the ignition is
turned on as a check to show it is
working.
It also comes on when the fuel tank
is low on fuel. The light turns off
when fuel is added. If it does not,
have the vehicle serviced.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
Driving and Operating 167
Warning (Continued)
After driving through a large
puddle of water or a car/vehicle
wash, lightly apply the brake
pedal until the brakes work
normally.
Flowing or rushing water creates
strong forces. Driving through
flowing water could cause the
vehicle to be carried away. If this
happens, you and other vehicle
occupants could drown. Do not
ignore police warnings and be
very cautious about trying to drive
through flowing water.
Hydroplaning
Hydroplaning is dangerous. Water
can build up under the vehicle's
tires so they actually ride on the
water. This can happen if the road is
wet enough and you are going fast
enough. When the vehicle is
hydroplaning, it has little or no
contact with the road.There is no hard and fast rule about
hydroplaning. The best advice is to
slow down when the road is wet.
Other Rainy Weather Tips
Besides slowing down, other wet
weather driving tips include:
.
Allow extra following distance.
. Pass with caution.
. Keep windshield wiping
equipment in good shape.
. Keep the windshield washer fluid
reservoir filled.
. Have good tires with proper
tread depth. See Tires0254.
. Turn off cruise control.
Hill and Mountain Roads
Driving on steep hills or through
mountains is different than driving
on flat or rolling terrain. Tips include:
.
Keep the vehicle serviced and in
good shape.
. Check all fluid levels and brakes,
tires, cooling system, and
transmission. .
Shift to a lower gear when going
down steep or long hills.
{Warning
Using the brakes to slow the
vehicle on a long downhill slope
can cause brake overheating, can
reduce brake performance, and
could result in a loss of braking.
Shift the transmission to a lower
gear to let the engine assist the
brakes on a steep downhill slope.
{Warning
Coasting downhill in N (Neutral)
or with the ignition off is
dangerous. This can cause
overheating of the brakes and
loss of steering. Always have the
engine running and the vehicle
in gear.
. Drive at speeds that keep the
vehicle in its own lane. Do not
swing wide or cross the
center line.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
186 Driving and Operating
shift to the next lower gear if the
engine rpm is too high, nor to the
next higher gear when the maximum
engine rpm is reached.
If shifting is prevented for any
reason, a SHIFT DENIED message
will be displayed in the instrument
cluster. SeeTransmission
Messages 0136.
When accelerating the vehicle from
a stop in snowy and icy conditions,
it is suggested to shift into second
gear. A higher gear allows the
vehicle to gain more traction on
slippery surfaces.Drive Systems
All-Wheel Drive
Vehicles with this feature always
send engine power to all four
wheels. It is fully automatic, and
adjusts itself as needed for road
conditions.
All-Wheel Drive (AWD) system
performance will be automatically
reduced when the compact spare
tire is in use. To restore full AWD
performance, and prevent excessive
wear to the AWD system, replace
the compact spare tire with a
full-size tire as soon as possible.
See Compact Spare Tire 0280.
Brakes
Antilock Brake
System (ABS)
This vehicle has an Antilock Brake
System (ABS), an advanced
electronic braking system that helps
prevent a braking skid.
When the vehicle begins to drive
away, ABS checks itself.
A momentary motor or clicking noise
may be heard while this test is going
on, and it may even be noticed that
the brake pedal moves a little. This
is normal.
If there is a problem with ABS, this
warning light stays on. See Antilock
Brake System (ABS) Warning Light
0 117.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
Driving and Operating 187
If driving safely on a wet road and it
becomes necessary to slam on the
brakes and continue braking to
avoid a sudden obstacle, a
computer senses the wheels are
slowing down. If one of the wheels
is about to stop rolling, the computer
will separately work the brakes at
each wheel.
ABS can change the brake pressure
to each wheel, as required, faster
than any driver could. This can help
you steer around the obstacle while
braking hard.
As the brakes are applied, the
computer keeps receiving updates
on wheel speed and controls
braking pressure accordingly.
Remember: ABS does not change
the time needed to get a foot up to
the brake pedal or always decrease
stopping distance. If you get too
close to the vehicle in front of you,
there will not be enough time to
apply the brakes if that vehicle
suddenly slows or stops. Always
leave enough room up ahead to
stop, even with ABS.Using ABS
Do not pump the brakes. Just hold
the brake pedal down firmly and let
ABS work. You may hear the ABS
pump or motor operating and feel
the brake pedal pulsate. This is
normal.
Braking in Emergencies
ABS allows you to steer and brake
at the same time. In many
emergencies, steering can help
more than even the very best
braking.
Electric Parking Brake
The Electric Parking Brake (EPB)
can always be activated, even if the
ignition is off. To prevent draining
the battery, avoid repeated cycles of
the EPB when the engine is not
running.
The system has a red parking brake
status light and an amber parking
brake warning light. There are also
parking brake-related Driver
Information Center (DIC) messages.
In case of insufficient electrical
power, the EPB cannot be applied
or released.
Before leaving the vehicle, check
the red parking brake status light to
ensure that the parking brake is
applied.
EPB Apply
To apply the EPB:1. Be sure the vehicle is at a complete stop.
2. Press the EPB switch momentarily.
The red parking brake status light
will flash and then stay on once the
EPB is fully applied. If the red