check engine NISSAN SENTRA 2023 Repair Manual

NOTE:
NISSAN does not advocate the se of non-
OEM approved af termarket flushing sys-
tems and strongly advises against per-
forming these services on NISSAN
products. Many of the af termarket flush-
ing systems use non-OEM approved
chemicals or solvents, the use of which
has not been validated by NISSAN.
For recommended fuel, lubricants, fluids,
grease, and refrigerant, see “Recom-
mended fluids/lubricants and capaci-
ties” (P. 10-2)
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 inter-
vals. 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 replac-
ing coolant, be sure to use only Genuine
NISSAN Long Life Antifreeze/Coolant (blue)
or equivalent with the proper mixture. (For additional information on the proper mix-
ture for your area, see “Engine cooling sys-
tem” (P. 8-4).
NOTE: Mixing any other type of coolant
or the use of non-distilled water may re-
duce the recommended service interval
of the coolant.
Engine oil and oil filter:
Replace engine oil
and oil filter at the specified intervals. For
recommended oil grade and viscosity see
“Recommended fluids/lubricants and ca-
pacities” (P. 10-2).
Engine valve clearance*: Inspect only if
valve noise increases. Adjust valve clear-
ance if necessary.
Evaporative emissions control vapor
lines*: Check vapor lines for leaks or loose-
ness. Tighten connections or replace parts
as necessary.
Fuel filter: Periodic maintenance is not re-
quired. (in-tank type filter)
Fuel lines*: Check the fuel hoses, piping
and connections for leaks, looseness, or
deterioration. Tighten connections or re-
place parts as necessary.
Spark plugs: Replace at specified intervals.
Install new plugs of the type as originally
equipped.
CHASSIS AND BODY
MAINTENANCE:
Brake lines and cables: Visually inspect for
proper installation. Check for chafing,
cracks, deterioration, and signs of leaking.
Replace any deteriorated or damaged
parts immediately.
Brake pads, rotors, drums and linings:
Check for wear, deterioration and fluid
leaks. Replace any deteriorated or dam-
aged parts immediately.
Exhaust system: Visually inspect the ex-
haust pipes, muffler and hangers for leaks,
cracks, deterioration, and damage. Tighten
connections or replace parts as necessary.
In-cabin microfilter: Replace at specified
intervals. When driving for prolonged peri-
ods in dusty conditions, replace the filter
more frequently.
Steering gear and linkage, axle and sus-
pension parts, drive shaf t boots: Check
for damage, looseness, and leakage of oil
or grease. Under severe driving conditions,
inspect more frequently.
Tire rotation: Rotate tires at the specified
interval shown in the maintenance sched-
ule. When rotating tires, check for damage
and uneven wear. Replace if necessary.
9-6Maintenance and schedules

Af termarket fuel additives
NISSAN does not recommend the use of
any af termarket fuel additives (for ex-
ample, fuel injector cleaner, octane
booster, intake valve deposit removers,
etc.) which are sold commercially. Many of
these additives intended for gum, varnish
or deposit removal may contain active sol-
vents or similar ingredients that can be
harmful to the fuel system and engine.
Octane rating tips
Using unleaded gasoline with an octane
rating lower than recommended can
cause persistent, heavy “spark knock.”
(“Spark knock” is a metallic rapping
noise.) If severe, this can lead to engine
damage. If you detect a persistent heavy
spark knock even when using gasoline
of the stated octane rating, or if you hear
steady spark knock while holding a
steady speed on level roads, it is recom-
mended that you have a NISSAN dealer
correct the condition. Failure to correct
the condition is misuse of the vehicle, for
which NISSAN is not responsible.Incorrect ignition timing may result in
spark knock, af ter-run and/or overheating,
which may cause excessive fuel consump-
tion or engine damage. If any of the above
symptoms are encountered, have your ve-
hicle checked. It is recommended that you
visit a NISSAN dealer for servicing.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is not
a cause for concern, because you get the
greatest fuel benefit when there is light
spark knock for a short time under heavy
engine load.
10-6Technical and consumer information

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
readiness 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 af ter 20 seconds, the I/M test condi-
tion is “ready”. It is recommended that you
visit a NISSAN dealer to set the “ready con-
dition” or to prepare the vehicle for testing.This vehicle is equipped with an Event Data
Recorder (EDR). The main purpose of an
EDR is to record, in certain crash or near
crash-like situations, such as an air bag
deployment or hitting a road obstacle, data
that will assist in understanding how a ve-
hicle's systems performed. The EDR is de-
signed to record data related to vehicle dy-
namics and safety systems for a short
period of time, typically 30 seconds or less.
The EDR in this vehicle is designed to re-
cord such data as:
• How various systems in your vehicle were
operating;
• Whether or not the driver and passenger safety belts were buckled/fastened;
• How far (if at all) the driver was depress- ing the accelerator and/or brake pedal;
and,
• How fast the vehicle was traveling.
• Sounds are not recorded. These data can help provide a better un-
derstanding of the circumstances in which
crashes and injuries occur. NOTE: EDR data
are recorded by your vehicle only if a non-
trivial crash situation occurs; no data are
recorded by the EDR under normal driving
conditions and no personal data (e.g.,
name, gender, age, and crash location) are
recorded. However, other parties, such as
law enforcement, could combine the EDR
data with the type of personally identif ying
data routinely acquired during a crash
investigation.
To read data recorded by an EDR, special
equipment is required, and access to the
vehicle or the EDR is needed. In addition to
the vehicle manufacturer and NISSAN
dealer, other parties, such as law enforce-
ment, that have the special equipment, can
read the information if they have access to
the vehicle or the EDR.
EDR data will only be accessed with the
consent of the vehicle owner or lessee or
as otherwise required or permitted by law.
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST
EVENT DATA RECORDERS (EDR)
10-24Technical and consumer information

Bulb check/instrument panel........2-10Bulb replacement...............8-27
C
C.M.V.S.S. certification label.........10-13Capacities and recommended
fuel/lubricants.................10-2Car phone or CB radio............4-66Cargo
(See vehicle loading information).....10-16Chassis control................5-133Check tire pressure..........2-29,2-44Child restraints.......1-21,1-22,1-23,1-25LATCH (Lower Anchors and Tethers for
CHildren) System..............1-25Precautions on child
restraints............1-30, 1-36, 1-40Top tether strap anchor point
locations...................1-28Child safety rear door lock..........3-7Cleaning exterior and interior......7-2,7-5Clock set/adjustment.............4-5Clutch
Clutch fluid..................8-11Cold weather driving............5-141Console box................. .2-67Continuously Variable Transmission
(CVT).......................5-16Continuously Variable Transmission
(CVT) fluid..................8-10Driving with Continuously Variable
Transmission (CVT)............5-16
Control panel buttons.............4-3Brightness/contrast button........4-7Controls
Audio controls (steering wheel).....4-62Heater and air conditioner
controls................4-32, 4-40CoolantCapacities and recommended
fuel/lubricants
...............10-2Changing engine coolant.........8-5Checking engine coolant level......8-5Engine coolant temperature gauge. . .2-6Corrosion protection..............7-8Cruise control................ .5-59Cup holders...............2-68, 2-69
D
Daytime Running Light System......2-57Defroster switch
Rear window and outside mirror
defroster switch
..............2-51Dimensions and weights..........10-11Dimmer switch for instrument panel. . .2-58Display controls (see control panel
buttons).................... .4-3Door locks....................3-4Drive belt....................8-15Driving
Cold weather driving...........5-141Driving with Continuously Variable
Transmission (CVT)............5-16Driving with manual transmission. . .5-21
Precautions when starting and
driving.................... .5-4Driving the vehicle...............5-16
E
ECO mode switch...............5-24Economy - fuel................5-126Emergency call (SOS) button........2-62Emergency engine shutoff.......5-13,6-2Emission control information label. . . .10-13Emission control system warranty. . . .10-22Engine
Before starting the engine........5-14Capacities and recommended
fuel/lubricants...............10-2Changing engine coolant.........8-5Changing engine oil............8-6Changing engine oil filter.........8-6Checking engine coolant level......8-5Checking engine oil level.........8-6Engine compartment check
locations.................. .8-3Engine coolant temperature gauge. . .2-6Engine cooling system...........8-4Engine oil...................8-6Engine oil and oil filter
recommendation.............10-7Engine oil pressure warning light. . . .2-11Engine oil viscosity.............10-7Engine serial number..........10-13Engine specifications...........10-9Starting the engine............5-14
11-2

Intelligent Forward Collision Warning
(I-FCW).....................5-106Intelligent Key systemKey operating range............3-9Key operation................3-10Mechanical key................3-3Remote keyless entry operation. . . .3-13Troubleshooting guide.......3-16,3-17Warning signals...........3-16,3-17Intelligent Trace Control..........5-133Interior light...............2-74,2-75Interior trunk lid release...........3-22iPod® Player................. .4-56ISOFIX child restraints.............1-25
J
Jump starting..............6-9, 8-14
K
Key.........................3-2Key fob battery replacement........8-23Keyless entry
With Intelligent Key system
(See Intelligent Key system)
.......3-13KeysNISSAN Intelligent Key®........3-2,3-7NISSAN Vehicle Immobilizer System
keys..................... .3-3
L
Labels
Air conditioner specification label. . .10-14C.M.V.S.S. certification label.......10-13Emission control information label. .10-13Engine serial number..........10-13F.M.V.S.S. certification label........10-13Tire and Loading Information label. .10-14Vehicle identification number (VIN)
plate.................... .10-12Warning labels (for SRS)..........1-65Lane Departure Warning (LDW).......5-29LATCH (Lower Anchors and Tethers for
CHildren) System...............1-25Launch bar menu................4-7License plate
Installing the license plate........10-15LightAir bag warning light........1-65, 2-12Brake light (See stop light)........8-27Bulb check/instrument panel......2-10Bulb replacement.............8-27Charge warning light............2-11Exterior and Interior lights........8-27Fog light switch..............2-59Fog lights..................8-26Headlight and turn signal switch. . . .2-52Headlight control switch.........2-52Headlights..................8-25Interior light..............2-74,2-75Light bulbs.................8-25Low tire pressure warning light.....2-13
Low windshield-washer fluid
warning light.............2-28, 2-43Spotlights (See map light)........2-75Trunk light..................2-76Lights......................8-25Map lights..................2-75Lock
Child safety rear door lock.........3-7Door locks................. .3-4Fuel-filler door lock opener lever. . . .3-23Power door locks...........3-5, 3-6Trunk lid lock opener lever........3-22Loose fuel cap warning........2-28,2-42Low fuel warning light.........2-28, 2-43Low tire pressure warning light.......2-13Low windshield-washer fluid
warning light..............2-28, 2-43Luggage (See vehicle loading
information)................. .10-16
M
Maintenance
General maintenance...........9-2Inside the vehicle..............9-3Maintenance precautions.........8-2Outside the vehicle.............9-2Seat belt maintenance..........1-20Under the hood and vehicle.......9-4Maintenance requirements..........9-2Maintenance schedules............9-7Malfunction indicator light..........2-11Manual front seat adjustment........1-3
11-4

Map lights....................2-75Menu button...................4-5Meters and gauges..............2-4Instrument brightness control.....2-58Mirror
Automatic anti-glare inside mirror. . .3-28Outside mirror control..........3-29Outside mirrors..............3-29Rearview...................3-28Vanity mirror................3-27Mirrors......................3-28Moonroof.................2-73,7-5Moving Object Detection (MOD)......4-27
N
NISSAN Intelligent Key®..........3-2,3-7NISSAN Intelligent Key® battery
discharge indicator..............5-13NISSAN Vehicle Immobilizer
System................. .2-49, 5-14NissanConnect® Owner's Manual......4-2
O
Octane rating (See fuel octane rating). .10-6Oil
Capacities and recommended
fuel/lubricants
...............10-2Changing engine oil............8-6Changing engine oil filter.........8-6Checking engine oil level.........8-6Engine oil.................. .8-6
Engine oil and oil filter
recommendation.............10-7Engine oil viscosity.............10-7Outside mirror control............3-29Outside mirrors................3-29Overhead sunglasses holder........2-68Overheat
If your vehicle overheats.........6-11Owner's manual order form........10-25Owner's manual/service manual
order information..............10-25
P
ParkingParking/parking on hills.........5-127Parking brake.................5-22Phone, Bluetooth® hands-free system. .4-66PowerPower door locks...........3-5, 3-6Power outlet................2-64Powerrearwindows............2-71Power steering system.........5-128Power windows..............2-70Rear power windows...........2-71Power outlet................. .2-64Power steering................5-128Precautions
Maintenance precautions.........8-2Precautions on booster
seats...............1-30, 1-36, 1-40Precautions on child
restraints............1-30, 1-36, 1-40
Precautions on seat belt usage.....1-12Precautions on supplemental
restraint system..............1-44Precautions when starting and
driving.................... .5-4Push starting..................6-11
R
Radio
Car phone or CB radio..........4-66FM/AM radio................4-48Readiness for inspection maintenance
(I/M) test................... .10-24Rear Automatic Braking (RAB). . . .2-15, 5-85Rear Cross Traffic Alert (RCTA).......5-48Rear Door Alert.........2-27,2-42, 2-62Rear power windows.............2-71Rear seat.....................1-7Rear Sonar System (RSS)..........5-135Rear window and outside mirror
defroster switch................2-51Rearview mirror................3-28RearView Monitor................4-8Recommended Fluids............10-2Recorders
Event Data................ .10-24Refrigerant recommendation.......10-8Registering a vehicle in another
country.................... .10-12Remote Engine Start..........3-18,5-15Reporting safety defects (US only). . . .10-22
11-5