2021 INFINITI Q50 check engine light

9-4Maintenance and schedules
and smoothly, and are installed securely.
Check the belt webbing for cuts, fraying,
wear or damage.
Steering wheel:Check for changes in the
steering conditions, such as excessive free
play, hard steering or strange noises.
Warning lights and chimes: Make sure that
all warning lights and chimes are operating
properly.
Windshield defroster: Check that the air
comes out of the defroster outlets properly
and in sufficient quantity when operating
the heater or air conditioner.
Windshield wiper and washer*: Check that
the wipers and washer operate properly and
that the wipers do not streak.
Under the hood and vehicle
The maintenance items listed here should be
checked periodically (for example, each time
you check the engine oil or refuel).
Battery*: Check the fluid level in each cell. It
should be between the MAX and MIN lines.
Vehicles operated in high temperatures or
under severe condition require frequent
checks of the battery fluid level.
NOTE:
Care should be taken to avoid situations
that can lead to potential battery discharge
and potential no-start conditions such as: 1.
Installation or extended use of electro-
nic accessories that consume battery
power when the engine is not running
(Phone chargers, GPS, DVD players,
etc.)
2. Vehicle is not driven regularly and/or
only driven short distances.
In these cases, the battery may need to be
charged to maintain battery health.
Brake fluid level*: Make sure that the brake
fluid level is between the MAX and MIN lines
on the reservoir.
Engine coolant level*: Check the coolant
level when the engine is cold.
Intercooler coolant level*: Check the coolant
level when the engine is cold.
Engine drive belts*: Make sure that no belt is
frayed, worn, cracked or oily.
Engine oil level*: Check the level after
parking the vehicle on a level spot and
turning off the engine. Wait more than 15
minutes for the oil to drain back into the oil
pan.
Exhaust system: Make sure there are no
loose supports, cracks or holes. If the sound
of the exhaust seems unusual or there is a
smell of exhaust fumes, immediately have
the exhaust system inspected. It is recom-
mended you visit an INFINITI retailer for this
service. (See “Precautions when starting and driving” (P.5-4).)
Fluid leaks:
Check under the vehicle for fuel,
oil, water or other fluid leaks after the
vehicle has been parked for a while. Water
dripping from the air conditioner after use is
normal. If you should notice any leaks or if
gasoline fumes are evident, check for the
cause and have it corrected immediately.
Radiator and hoses: Check the front of the
radiator and clean off any dirt, insects,
leaves, etc., that may have accumulated.
Make sure the hoses have no cracks, defor-
mation, rot or loose connections.
Underbody: The underbody is frequently
exposed to corrosive substances such as
those used on icy roads or to control dust. It
is very important to remove these sub-
stances, otherwise rust will form on the
floor pan, frame, fuel lines and around the
exhaust system. At the end of winter, the
underbody should be thoroughly flushed
with plain water, being careful to clean
those areas where mud and dirt may accu-
mulate. For additional information, see
“Cleaning exterior” (P.7-2).
Windshield washer fluid*: Check that there
is adequate fluid in the reservoir.

10-6Technical and consumer information
may cause excessive fuel consumption or
damage to the engine. If any of the above
symptoms are encountered, have your ve-
hicle checked. It is recommended you visit an
INFINITI retailer for servicing.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is no
cause for concern, because you get the
greatest fuel benefit when there is light
spark knock for a short time under heavy
engine load.
JVT0342X
API certification mark
API service symbol
ENGINE OIL AND OIL FILTER
RECOMMENDATION
Selecting the correct oil
It is essential to choose the correct grade,
quality, and viscosity engine oil to ensure
satisfactory engine life and performance,
see “Capacities and recommended fluids/
lubricants” (P.10-2). INFINITI recommends
the use of an energy conserving oil in order
to improve fuel economy.
Select only engine oils that meet the Amer-
ican Petroleum Institute (API) certificationor International Lubricant Standardization
and Approval Committee (ILSAC) certifica-
tion and SAE viscosity standard. These oils
have the API certification mark on the front
of the container. Oils which do not have the
specified quality label should not be used as
they could cause engine damage.Oil additives
INFINITI does not recommend the use of oil
additives. The use of an oil additive is not
necessary when the proper oil type is used
and maintenance intervals are followed.
Oil which may contain foreign matter or has
been previously used should not be used.

wwwapps.tc.gc.ca/Saf-Sec-Sur/7/
PCDB-BDPP/fc-cp.aspx?lang=fra
(French speakers).
Additional information concerning
motor vehicle safety may be obtained
from Transport Canada’s Road
Safety Information Centre at 1-
800-333-0371 or online at www.tc.
gc.ca/ roadsafety (English speakers)
or www.tc.gc.ca/securiteroutiere
(French speakers).
To notify INFINITI of any safety
concerns please contact our Consu-
mer Information Centre toll free at 1-
800- 361-4792.
WARNING
A vehicle equipped with Intelligent All-
Wheel Drive (AWD) should never be
tested using a two wheel dynamometer
(such as the dynamometers used by
some states for emissions testing), or
similar equipment. Make sure you inform
test facility personnel that your vehicle
is equipped with AWD before it is placed
on a dynamometer. Using the wrong test
equipment may result in transmission
damage or unexpected vehicle move-
ment which could result in serious vehicle
damage or personal injury.
Due to legal requirements in some states/
areas, your vehicle may be required to be in
what is called the “ready condition” for an
Inspection/Maintenance (I/M) test of the
emission control system.
The vehicle is set to the “ready condition”
when it is driven through certain driving
patterns. Usually, the “ready condition” can
be obtained by ordinary usage of the vehicle.
If a powertrain system component is re-
paired or the battery is disconnected, the
vehicle may be reset to a “not ready condi-
tion”. Before taking the I/M test, check the
vehicle’s inspection/maintenance test readi- ness condition. Place the ignition switch in
the ON position without starting the engine.
If the Malfunction Indicator Light (MIL)
comes on steady for 20 seconds and then
blinks for 10 seconds, the I/M test condition
is “not ready”. If the MIL does not blink after
20 seconds, the I/M test condition is
“ready”.
It is recommended you visit an INFINITI
retailer to set the “ready condition” or to
prepare the vehicle for testing.
Technical and consumer information10-23
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST (US only)

11 Index
A
ABS (Anti-lock Braking System) ................... 5-126
Active Lane Control ............................................ 5-25
Active noise cancellation ................................. 5-137
Active sound enhancement ............................ 5-137
Active trace control .......................................... 5-129
Air bag systemFront-seat mounted side-impact
upplemental air bag system ....................... 1-57
Roof-mounted curtain side-impact
supplemental air bag system ..................... 1-57
Air bag warning labels ....................................... 1-60
Air bag warning light .............................. 1-60, 2-12
Air cleaner housing filter ................................... 8-15
Air conditioner
Air conditioner operation ............................ 4-36
Air conditioner service ................................ 4-42
Air conditioner specification label ......... 10-13
Air conditioning system refrigerant and
lubricant recommendations ....................... 4-42
Air conditioning system refrigerant and
oil recommendations .................................... 10-7
Automatic air conditioner ........................... 4-37
DUAL mode setting ..................................... 4-40
Heater and air conditioner .......................... 4-36
Servicing air conditioner ............................. 4-42
Air deflectors ...................................................... 10-16 Alarm
How to stop alarm (see vehicle
security system) ............................................. 2-31
Alcohol, drugs and driving ................................ 5-10
Android Auto .......................................................... 4-2
Antenna .................................................................. 4-43
Anti-lock Braking System (ABS) ................... 5-126
Appearance care
Exterior appearance care ............................... 7-2
Interior appearance care ................................ 7-5
Apple CarPlay
®...................................................... 4-2
Armrest ...................................................................... 1-7
Around View
®Monitor ...................................... 4-11
Audible reminders ................................................. 2-17
Autolight system .................................................. 2-36
Automatic Automatic air conditioner ........................... 4-37
Automatic Transmission Fluid (ATF) ......... 8-9
Driving with automatic transmission ....... 5-16
Automatic door locks ............................................ 3-5
Automatic seat positioner ................................ 3-33
Avoiding collision and rollover ............................ 5-9
B
Back-up Collision Intervention (BCI) .............. 5-60
Battery .................................................................... 8-11
Battery replacement, Intelligent Key ......... 3-2
Battery saver system .................................... 2-39
Intelligent Key ................................................. 8-19 Variable voltage control system ............... 8-13
Before starting the engine ................................ 5-14
Belts (See drive belts) ......................................... 8-13
Blind Spot Intervention
®(BSI) ......................... 5-48
Blind Spot Warning (BSW) .............................. 5-40
Brake
Anti-lock Braking System (ABS) ............. 5-126
Brake fluid ...................................................... 8-10
Brake force distribution ............................ 5-128
Brake system ................................................ 5-125
Parking brake operation ............................. 5-20
Brake warning light .............................................. 2-11
Break-in schedule .............................................. 5-118
Bulb check/instrument panel ............................ 2-11
Bulb replacement ................................................. 8-22
C
Camera aiding sonar function ......................... 4-25
Capacities and
recommended fluids/lubricants ....................... 10-2
Car phone or CB radio ....................................... 4-43
Card holder ............................................................ 2-50
Catalytic converter Three-way catalyst ......................................... 5-5
Changing intercooler coolant ............................. 8-6
Chassis control ................................................... 5-131
Check tire pressure warning ............................. 2-22
Checking intercooler coolant level .................... 8-6

11-2
Child restraints ..................................................... 1-22LATCH system ............................................... 1-24
Precautions on child restraints .................. 1-22
Child safety ............................................................ 1-19
Child safety rear door lock .................................. 3-6
Chimes Audible reminders .......................................... 2-17
Seat belt warning light
and chime ............................................. 1-14, 2-12
Circuit breaker
Fusible link ....................................................... 8-18
Cleaning exterior and interior .................... 7-2, 7-5
Climate control
Automatic air conditioner ........................... 4-37
Clock ...................................................................... 2-29
Coat hooks ............................................................ 2-51
Cockpit ...................................................................... 2-3
Cold weather driving ........................................ 5-134
Console box ........................................................... 2-50
Coolant Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine coolant ............................... 8-5
Checking engine coolant level ...................... 8-4
Corrosion protection ............................................. 7-7
Courtesy light ....................................................... 2-59
Cruise control ....................................................... 5-69
Fixed speed cruise control (on
ICC system) ..................................................... 5-87
Intelligent Cruise Control (ICC) ................. 5-71
Cruise indicator .................................................... 2-23 Cup holders ........................................................... 2-48
Current fuel consumption ................................. 2-27
D
Daytime running light system .......................... 2-39
Defroster switch
Rear window and outside mirror
defroster switch ............................................. 2-35
Dimensions ......................................................... 10-10
Direct Adaptive Steering ................................. 5-123
Distance Control Assist (DCA) ........................ 5-91
Distance to empty ............................................... 2-27
Drive belts .............................................................. 8-13
Drive positioner .................................................... 3-33
Driver assist system indicator .......................... 2-24
Driving Cold weather driving ................................. 5-134
Driving with automatic transmission ....... 5-16
Precautions when starting and driving ..... 5-4
E
ECO drive indicator light .................................... 2-17
ECO mode ............................................................. 5-22
ECO pedal system ............................................... 5-22
EconomyFuel .................................................................. 5-119
Elapsed time ......................................................... 2-27
Elapsed time and trip odometer ..................... 2-27
Emergency Call (SOS) button .......................... 2-46
Emission control information label ............... 10-12 Emission control system warranty ............... 10-21
Engine
Before starting the engine .......................... 5-14
Break-in schedule ........................................ 5-118
Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine coolant ............................... 8-5
Changing engine oil and filter ...................... 8-7
Checking engine coolant level ...................... 8-4
Checking engine oil level ............................... 8-7
Coolant temperature gauge ......................... 2-8
Emergency engine shut off ......................... 5-13
Engine block heater .................................... 5-135
Engine compartment check locations ........ 8-3
Engine cooling system ................................... 8-3
Engine oil ........................................................... 8-7
Engine oil and filter
replacement indicator ................................... 2-25
Engine oil and oil
filter recommendation .................................. 10-6
Engine oil viscosity ........................................ 10-7
Engine serial number ................................. 10-12
Engine specifications ................................... 10-8
Engine start operation indicator ............... 2-21
If your vehicle overheats ................................ 6-7
Remote engine start ..................................... 3-19
Remote engine start
operation indicator ........................................ 2-21
Starting the engine ....................................... 5-15
Engine coolant temperature gauge .................. 2-8

Maintenance requirements ........................... 9-2
Maintenance schedules ................................. 9-6
Outside the vehicle ......................................... 9-2
Seat belt maintenance ................................. 1-19
Standard maintenance ................................... 9-8
Under the hood and vehicle ......................... 9-4
Maintenance schedules ........................................ 9-6
Malfunction indicator light (MIL) .................... 2-15
Map lights .............................................................. 2-56
Master warning light ............................... 2-12, 2-16
Mechanical key (Intelligent Key system) .......... 3-3
Memory seat ......................................................... 3-33
Memory storage
Memory seat ................................................... 3-33
Meter Trip computer ................................................. 2-27
Meters and gauges ................................................ 2-6 Instrument brightness control ................... 2-41
Mirror
Inside mirror .................................................... 3-29
Outside mirrors ............................................. 3-30
Vanity mirror ................................................... 3-32
Monitor Around View
®Monitor ................................ 4-11
RearView Monitor ........................................... 4-3
Moonroof ............................................................... 2-54
Moving Object Detection (MOD) .................. 4-30
N
New vehicle break-in ........................................ 5-118
O
Odometer .................................................................. 2-7
Off-road recovery .................................................. 5-9
Oil Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine oil and filter ...................... 8-7
Checking engine oil level ............................... 8-7
Engine oil ........................................................... 8-7
Engine oil viscosity ........................................ 10-7
One touch unlock sensor (See Intelligent
Key system) .............................................................. 3-9
Operation Indicators for operation ............................... 2-21
Outside air temperature .................................... 2-29
Outside mirrors .................................................... 3-30
Overheat, If your vehicle overheats .................. 6-7
Owner’s Manual/Service Manual
order information ............................................. 10-24
P
Panic alarm ............................................................ 3-17
Parking
Parking brake operation ............................. 5-20
Parking on hills ............................................. 5-122
Parking brake break-in .................................... 5-126 Personal lights ...................................................... 2-57
PERSONAL mode ............................................... 5-24
Phone
Car phone or CB radio ................................ 4-43
Power Power door lock ............................................... 3-4
Power outlet ................................................... 2-45
Power steering system .............................. 5-123
Power windows ............................................. 2-52
Power moonroof ................................................. 2-55
Power steering warning light ........................... 2-16
Pre-crash seat belts with
comfort function ................................................... 1-15
Precautions Braking precautions .................................... 5-125
Child restraints ............................................... 1-22
Cruise control ................................................. 5-69
Maintenance ..................................................... 8-2
Seat belt usage .............................................. 1-12
Supplemental restraint system .................. 1-42
When starting and driving ............................ 5-4
Predictive Forward Collision
Warning (PFCW) .............................................. 5-109
Push starting ............................................................ 6-7
Push-button ignition switch .............................. 5-11R
Radio Car phone or CB radio ................................ 4-43
Rain-sensing auto wiper system ..................... 2-34
Rapid air pressure loss .......................................... 5-9
11-5