2023 INFINITI QX80 check engine

The following descriptions are provided to
give you a better understanding of the
scheduled maintenance items that should
be regularly checked or replaced. The main-
tenance schedule indicates at which mile-
age/time intervals each item requires
service.
In addition to scheduled maintenance, your
vehicle requires that some items be checked
during normal day-to-day operation. Refer
to “General maintenance” (P.9-2).
Items marked with “*” are recommended by
INFINITI for reliable vehicle operation. You
are not required to perform maintenance on
these items in order to maintain the warran-
ties which come with your vehicle. Other
maintenance items and intervals are re-
quired.
When applicable, additional information can
be found in the “8. Do-it yourself” section of
this manual.
NOTE:
INFINITI does not advocate the use of non-
OEM approved aftermarket flushing sys-
tems and strongly advises against perform-
ing these services on an INFINITI product.
Many of the aftermarket flushing systems
use non-OEM approved chemicals or sol-
vents, the use of which has not been
validated by INFINITI.
For recommended fuel, lubricants, fluids,grease, and refrigerant, refer to “Capacities
and recommended fluids/lubricants” (P.10-
2) of this manual.
EMISSION CONTROL SYSTEM
MAINTENANCE
Drive belt*:
Check engine drive belt for wear, fraying or
cracking and for proper tension. Replace any
damaged drive belt.
Engine air filter:
Replace at specified intervals. When driving
for prolonged periods in dusty conditions,
check/replace the filter more frequently.
Engine coolant*
Replace coolant at the specified interval.
When adding or replacing coolant, be sure to
use only Genuine NISSAN Long Life Anti-
freeze/Coolant (blue) or equivalent with the
proper mixture. (Refer to “Engine cooling
system” (P.8-4) to determine the proper
mixture for your area.)
NOTE:
Mixing any other type of coolant or the use
of non-distilled water may reduce the
recommended service interval of the cool-
ant.
Engine oil and oil filter:
Replace engine oil and oil filter at the
specified intervals. For recommended oil
grade and viscosity refer to “Capacities and
recommended fluids/lubricants” (P.10-2).
Engine valve clearance*:
Inspect only if valve noise increases. Adjust
valve clearance if necessary.
Evaporative emissions control vapor lines*:
Check vapor lines for leaks or looseness.
Tighten connections or replace parts as
necessary.
Fuel lines*:
Check the fuel hoses, piping and connections
for leaks, looseness, or deterioration. Tight-
en connections or replace parts as necessary.
Spark plugs:
Replace at specified intervals. Install new
plugs of the type as originally equipped.
CHASSIS AND BODY MAINTE-
NANCE
Brake lines and cables:
Visually inspect for proper installation.
Check for chafing, cracks, deterioration,
and signs of leaking. Replace any deterio-
rated or damaged parts immediately.
Maintenance and schedules9-5
EXPLANATION OF SCHEDULED
MAINTENANCE ITEMS

10-6Technical and consumer information
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.
WAJ0360X
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.

10-28Technical and consumer information
down condition; check for improper
tongue load, overload, worn suspension
or other possible causes of either condi-
tion.
. Always secure items in the trailer to
prevent load shift while driving.
. Keep the cargo load as low as possible in
the trailer to keep the trailer center of
gravity low.
. Load the trailer so approximately 60% of
the trailer load is in the front half and
40% is in the back half. Also make sure
the load is balanced side to side.
. Check your hitch, trailer tire pressure,
vehicle tire pressure, trailer light opera-
tion, and trailer wheel lug nuts every time
you attach a trailer to the vehicle.
. Be certain your rearview mirrors conform
to all federal, state or local regulations. If
not, install any mirrors required for
towing before driving the vehicle.
. Determine the overall height of the
vehicle and trailer so the required clear-
ance is known.
Trailer towing tips
In order to gain skill and an understanding of
the vehicle’s behavior, you should practice
turning, stopping and backing up in an area
which is free from traffic. Steering stability,
and braking performance will be somewhat different than under normal driving condi-
tions.
.
Always secure items in the trailer to
prevent load shift while driving.
. Lock the trailer hitch coupler with a pin or
lock to prevent the coupler from inad-
vertently becoming unlatched.
. Avoid abrupt starts, acceleration or
stops.
. Avoid sharp turns or lane changes.
. Always drive your vehicle at a moderate
speed. Some states or provinces have
specific speed limits for vehicles that are
towing trailers. Obey the local speed
limits.
. When backing up, hold the bottom of the
steering wheel with one hand. Move
your hand in the direction in which you
want the trailer to go. Make small
corrections and back up slowly. If possi-
ble, have someone guide you when you
are backing up.
Always block the wheels on both vehicle and
trailer when parking. Parking on a slope is
not recommended; however, if you must do
so:
CAUTION
If you move the shift lever to the P
(Park) position before blocking the
wheels and applying the parking brake,
transmission damage could occur.
1. Apply and hold the brake pedal.
2. Have someone place blocks on the downhill side of the vehicle and trailer
wheels.
3. After the wheel blocks are in place, slowly release the brake pedal until the
blocks absorb the vehicle load.
4. Apply the parking brake.
5. Shift the transmission into P (Park).
6. Four-Wheel Drive (4WD) models:
Make sure that the 4WD shift switch is
engaged in the AUTO, 4HI or 4LO
position and the Automatic Transmission
(AT) park warning light is turned off.
7. Turn off the engine.
To drive away:
1. Apply and hold the brake pedal.
2. Start the engine.
3. Shift the transmission into gear.

10-30Technical and consumer information
(See “How to enable/disable the BSI
system” (P.5-45).)
— the Back-up Collision Intervention (BCI) system
(See “How to enable/disable the BCI
system” (P.5-58).)
— the Intelligent Cruise Control (ICC) system
(See “Intelligent Cruise Control (ICC)”
(P.5-64).)
— the Distance Control Assist (DCA) system
(See “How to enable/disable the DCA
system” (P.5-90).)
. Some states or provinces have specific
regulations and speed limits for vehicles
that are towing trailers. Obey the local
speed limits.
. Check your hitch, trailer wiring harness
connections, and trailer wheel lug nuts
after 50 miles (80 km) of travel and at
every break.
. When launching a boat, do not allow the
water level to go over the exhaust tail
pipe or rear bumper.
. Make sure you disconnect the trailer
lights before backing the trailer into the
water or the trailer lights may burn out.TOW mode
Using TOW mode is recommended when
pulling a heavy trailer or hauling a heavy
load. Push the TOW mode switch to activate
TOW mode. The TOW mode indicator light
in the meter illuminates when TOW mode is
selected. Push the TOW mode switch again
to turn TOW mode off. TOW mode is
automatically cancelled when the ignition
switch is placed in the OFF position.
TOW mode includes the following features:
. Grade logic — Adjusts transmission shifts
when pulling a trailer or hauling a load up
a grade.
. Downhill Speed Control (DSC) — auto-
matically downshifts when driving down
a grade with a trailer or heavy load to
help control vehicle speed.
Driving the vehicle in the TOW mode with no
trailer/load or light trailer/light load will not
cause any damage. However, fuel economy
may be reduced and the transmission/
engine driving characteristics may feel unu-
sual.
Trailer Sway Control
To minimize trailer sway, your vehicle may
apply braking to individual wheels based on
input from your vehicle sensors and vehicle
speed. Trailer Sway Control is a function of
the Vehicle Dynamic Control (VDC) system and is active when the VDC function is
enabled.
CAUTION
If the VDC OFF switch is on (meaning
VDC system OFF), the Trailer Sway
Control is also disabled.
When Trailer Sway Control is in operation,
the VDC warning light blinks. When vehicle
control is regained, VDC warning light will
turn OFF.
For additional information about the VDC
system, see “Vehicle Dynamic Control (VDC)
system” (P.5-135).
If Trailer Sway Control activates:
1. Take your foot off the accelerator pedal to allow the vehicle to coast and steer as
straight ahead as the road conditions
allow. This combination will help stabilize
the vehicle.
CAUTION
Do not try to correct trailer sway by
steering or applying the brakes.

10-34Technical and consumer information
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 Four-Wheel
Drive (4WD) 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 4WD 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 and
Canadian Provinces, 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 “ready condition” or to prepare
the vehicle for testing.
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST

11 Index
A
ABS (Anti-lock Braking System) ................... 5-134
Adaptive front lighting system (AFS) ............ 2-50
Advanced air bag system ................................... 1-57
Aiming controlAdaptive front lighting system (AFS) ..... 2-50
Headlights ........................................................ 2-49
Air bag system
Advanced air bag system ............................ 1-57
Driver and front passenger supplemental
knee air bag system ...................................... 1-65
Front passenger air bag and
status light ....................................................... 1-59
Front-seat mounted side-impact
supplemental air bag system ..................... 1-66
Roof-mounted curtain side-impact and
rollover supplemental air bag system ...... 1-66
Air bag warning labels ....................................... 1-69
Air bag warning light .............................. 1-70, 2-14
Air cleaner housing filter ................................... 8-14
Air conditioner
Advanced Climate Control System ......... 4-31
Air conditioner service ................................. 4-35
Air conditioner specification label ......... 10-13
Air conditioning system refrigerant
and oil recommendations ................ 4-35, 10-7
Automatic air conditioner .......................... 4-30
Automatic climate control ......................... 4-28
In-cabin microfilter ........................................ 4-35 Alarm, How to stop alarm (see vehicle
security system) ................................................... 2-39
Alcohol, drugs and driving ................................ 5-10
Alert
Rear Door Alert .............................................. 2-59
Antenna .................................................................. 4-36
Anti-lock Braking System (ABS) ................... 5-134
Anti-lock braking system (ABS)
warning light ......................................................... 2-15
Appearance care Exterior appearance care ............................... 7-2
Interior appearance care ................................ 7-5
Armrest ................................................................... 1-10
Around View
®Monitor ........................................ 4-4
Audible reminders ................................................ 2-19
Auto closure .......................................................... 3-25
Autolight system .................................................. 2-44
Automatic Automatic air conditioner .......................... 4-30
Automatic Transmission Fluid (ATF) ......... 8-8
Climate control .............................................. 4-28
Door locks .......................................................... 3-6
Drive positioner .............................................. 3-39
Driving with automatic transmission ....... 5-18
Seat positioner ............................................... 3-39
Average speed ...................................................... 2-35
Avoiding collision and rollover ........................... 5-8
B
Back door (See liftgate) ..................................... 3-22
Back-up Collision Intervention
(BCI) system .......................................................... 5-53
Battery .................................................................... 8-11
Battery saver system ........................ 2-49, 2-78
Intelligent Key ................................................. 8-21
Variable voltage control system ............... 8-13
Before starting the engine ................................ 5-15
Belts (See drive belts) ......................................... 8-13
Blind Spot Intervention
®(BSI) system .......... 5-42
Blind Spot Warning (BSW) ............................... 5-34
Booster seats ........................................................ 1-48
Brake Anti-lock Braking System (ABS) ............ 5-134
Brake booster ................................................. 8-17
Brake fluid ......................................................... 8-9
Brake system ................................................ 5-133
Parking brake operation .............................. 5-22
Warning light .................................................. 2-12
Break-in schedule .............................................. 5-114
Brightness control Instrument panel ............................................ 2-51
Bulb check/instrument panel ........................... 2-12
Bulb replacement ................................................. 8-23

11-2
C
Cabin air filter ....................................................... 4-35
Camera aiding sonar function ......................... 4-17
Capacities and
recommended fluids/lubricants ....................... 10-2
Car phone or CB radio ....................................... 4-37
Cargo floor box .................................................... 2-72
Cargo light ............................................................. 2-81
Catalytic converter, Three way catalyst ......... 5-4
Center ventilators ................................................ 4-27
ChargerWireless charger ............................................ 2-63
Child restraints ..................................................... 1-30 Booster seats .................................................. 1-48
LATCH system ............................................... 1-33
Precautions on child restraints .................. 1-31
Top tether strap ............................................. 1-35
Child safety ........................................................... 1-28
Child safety rear door lock .................................. 3-6
Chimes Audible reminders .......................................... 2-19
Seat belt warning light and chime ............ 2-14
Circuit breaker, Fusible link .............................. 8-19
Cleaning exterior and interior .................... 7-2, 7-5
Climate control Automatic air conditioner .......................... 4-30
Automatic climate control ......................... 4-28
Clock ........................................................................\
2-37
Coat hooks ............................................................. 2-71
Cockpit ...................................................................... 2-3 Cold weather driving ........................................ 5-137
Console box ........................................................... 2-70
Console light ......................................................... 2-80
Coolant
Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine coolant ............................... 8-5
Checking engine coolant level ...................... 8-5
Corrosion protection ............................................. 7-8
Cruise control ....................................................... 5-62
Fixed speed cruise control (on
ICC system) ..................................................... 5-81
Intelligent Cruise Control (ICC) ................ 5-64
Cruise indicator .................................................... 2-31
Cup holders ........................................................... 2-66
Current fuel consumption ................................. 2-35
D
Daytime Running Lights (DRL) system ......... 2-50
Digital video disc DVD ....................................... 4-37
Dimensions ......................................................... 10-10
Distance Control Assist (DCA) system .......... 5-85
Drive belts .............................................................. 8-13
Drive positioner .................................................... 3-39
Driver and front passenger supplemental
knee air bag ........................................................... 1-65
Driver Attention Alert (DAA) ......................... 5-112
Driving Cold weather driving .................................. 5-137
Driving with automatic transmission ....... 5-18
On-pavement and off-road driving ........... 5-8 Precautions when starting and driving ..... 5-4
Safety precautions ........................................ 5-10
E
E-Call (SOS) Button ........................................... 2-65
Economy, Fuel .................................................... 5-116
Elapsed time ......................................................... 2-35
Elapsed time and trip odometer ..................... 2-35
Emission control information label ............... 10-12
Emission control system warranty .............. 10-32
Engine
Before starting the engine .......................... 5-15
Break-in schedule ........................................ 5-114
Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine coolant ............................... 8-5
Changing engine oil and filter ...................... 8-6
Checking engine coolant level ...................... 8-5
Checking engine oil level ............................... 8-6
Coolant temperature gauge ......................... 2-8
Emergency engine shut off ......................... 5-14
Engine block heater ................................... 5-138
Engine compartment check locations ........ 8-3
Engine cooling system ................................... 8-4
Engine oil ........................................................... 8-6
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 ............... 2-28

General maintenance ...................................... 9-2
Inside the vehicle ............................................. 9-3
Maintenance precautions .............................. 8-2
Maintenance requirements ........................... 9-2
Maintenance schedules ................................. 9-6
Outside the vehicle ......................................... 9-2
Seat belt maintenance ................................. 1-27
Maintenance schedules ........................................ 9-6
Malfunction indicator light (MIL) ..................... 2-17
Map lights .............................................................. 2-80
Master warning light .............................. 2-14, 2-18
Mechanical key (Intelligent Key system) .......... 3-3
Memory seat ......................................................... 3-39
Memory storage, memory seat ...................... 3-40
Meter Trip computer ................................................. 2-35
Meters and gauges ................................................ 2-6 Instrument brightness control ................... 2-51
Mirror
Inside mirror ................................................... 3-30
Outside mirrors .............................................. 3-37
Smart Rearview Mirror ................................ 3-31
Vanity mirror ................................................... 3-39
Monitor Around View
®Monitor .................................. 4-4
Moonroof ............................................................... 2-76
Moving Object Detection (MOD) ................... 4-22
N
New vehicle break-in ........................................ 5-114
O
Odometer .................................................................. 2-7
Off-road recovery .................................................. 5-9
Oil Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine oil and filter ...................... 8-6
Checking engine oil level ............................... 8-6
Engine oil ........................................................... 8-6
Engine oil pressure gauge ............................. 2-9
Engine oil viscosity ........................................ 10-7
Operation, operational indicators ................... 2-28
Outside air temperature .................................... 2-37
Outside mirrors .................................................... 3-37
Overheat, If your vehicle overheats ............... 6-14
Owner’s Manual/Service Manual
order information ............................................. 10-35
P
Panic alarm ............................................................ 3-16
Parking
Brake break-in .............................................. 5-133
Parking brake operation .............................. 5-22
Parking on hills ............................................ 5-124
Phone Car phone or CB radio ................................. 4-37 Pocket ...................................................................... 2-71
Power
Front seat adjustment ................................... 1-4
Moonroof ......................................................... 2-77
Power door lock ............................................... 3-4
Power outlet .................................................. 2-60
Power steering fluid ....................................... 8-8
Power steering system .............................. 5-132
Power windows ............................................. 2-73
Precautions
Braking precautions .................................... 5-133
Child restraints ............................................... 1-31
Cruise control ................................................. 5-62
Driving safety ................................................. 5-10
Maintenance ..................................................... 8-2
On-pavement and off-road driving ........... 5-8
Seat belt usage .............................................. 1-18
Supplemental restraint system .................. 1-51
When starting and driving ............................ 5-4
Predictive Forward Collision
Warning (PFCW) .............................................. 5-104
Push starting ......................................................... 6-13
Push-button ignition switch ............................. 5-12R
Radio Car phone or CB radio ................................. 4-37
Rain-sensing auto wiper system ..................... 2-41
Rapid air pressure loss .......................................... 5-9
Readiness for inspection/maintenance
(I/M) test ............................................................ 10-34
11-5