2021 NISSAN SENTRA check engine

TROUBLESHOOTING GUIDE (Manual Transmission only)
SymptomPossible CauseRemedy
When the parking brake is fully applied The inside warning chime sounds con-
tinuously. The ignition switch is in the ACC or ON
position.Place the ignition switch in the OFF
position.
When opening the driver's door A warning chime sounds continuously. The ignition switch is in the ON posi-
tion.Place the ignition switch in the OFF
position.
When pushing the door handle re-
quest switch (if so equipped) to lock
the door The outside chime sounds for a few
seconds.
The Intelligent Key is inside the vehicle
or the trunk.Be sure to carry the Intelligent Key with
you.
When closing the doors The key warning light in the instrument
panel illuminates, the outside chime
sounds three times and the inside
warning chime sounds for approxi-
mately 3 seconds.
The ignition switch is in the ACC posi-
tion.
Place the ignition switch in the OFF
position.
The outside chime sounds for approxi-
mately 3 seconds and all doors unlock. The Intelligent Key is in the vehicle or
trunk.Be sure to carry the Intelligent Key with
you.
When pushing the ignition switch to
start the engine The key warning shows in the vehicle
information display.
The battery charge is low.Replace the battery with a new one.
For additional information, refer to
“Battery replacement” in the “Do-it-
yourself ” section of this manual.
Pre-driving checks and adjustments3-19

Thebutton will be on the NISSAN
Intelligent Key® if the vehicle has Remote
Engine Start. This feature allows the engine
to start from outside the vehicle.
The following features may be affected
when the Remote Engine Start feature is
used:
• Vehicles with a manual climate control system (if so equipped) will default to the
last used heating or cooling mode. • Vehicles with an automatic climate con-
trol system (if so equipped) will default to
either heating or cooling mode. For addi-
tional information, refer to “Remote En-
gine Start with Intelligent Climate Control”
in the “Monitor, climate, audio, phone and
voice recognition systems” section of this
manual.
Laws in some local communities may re-
strict the use of remote starters. For ex-
ample, some laws require a person using
Remote Engine Start to have the vehicle in
view. Check local regulations for any re-
quirements.
Other conditions may affect the function of
the Remote Engine Start feature. For addi-
tional information, refer to “Conditions the
Remote Engine Start will not work” in this
section.
Other conditions can affect the perfor-
mance of the Intelligent Key transmitter.
For additional information, refer to “NISSAN
Intelligent Key®” in this section.
REMOTE ENGINE START
OPERATING RANGE
CAUTION
When the Intelligent Key battery is dis-
charged or other strong radio wave
sources are present near the operating
location, the Intelligent Key operating
range becomes narrower, and the Intel-
ligent Key may not function properly.
The Remote Engine Start function can only
be used when the Intelligent Key is within
the specified operating range from the ve-
hicle.
LPD2995
REMOTE ENGINE START (if so
equipped)

The Remote Engine Start operating range
is approximately 197 f t (60 m) from the ve-
hicle.
REMOTE STARTING THE VEHICLE
To use the Remote Engine Start feature to
start the engine perform the following:
1. Aim the Intelligent Key at the vehicle.
2. Press the
button to lock all doors.
3. Within 5 seconds press and hold the
button until the turn signal lights
flash and the tail lamps turn on. If the
vehicle is not within view press and hold
the
button for at least 2 seconds.
The following events will occur when the
engine starts:
• The parking lights will turn on and remain on as long as the engine is running.
• The doors will be locked and the climate control system may come on.
• The engine will continue to run for 10 min- utes. Repeat the steps to extend the time
for an additional 10 minutes. For addi-
tional information, refer to “Extending en-
gine run time” in this section.
Depress and hold the brake then push the
push-button ignition switch to the ON po-
sition before driving. For additional infor- mation, refer to “Driving the vehicle” in the
“Starting and driving” section of this
manual.
EXTENDING ENGINE RUN TIME
The Remote Engine Start feature can be
extended one time by performing the
steps listed in “Remote starting the vehicle”
in this section. Run time will be calculated
as follows:
• The first 10 minute run time will start
when the Remote Engine Start function is
performed.
• The second 10 minutes will start immedi- ately when the Remote Engine Start
function is performed again. For example,
if the engine has been running for 5 min-
utes, and 10 minutes are added, the en-
gine will run for a total of 15 minutes.
• Extending engine run time will bring you to the two Remote Engine Start limit.
A maximum of two Remote Engine Starts,
or a single start with an extension, are al-
lowed between ignition cycles.
The ignition switch must be cycled to the
ON position and then back to the OFF po-
sition before the Remote Engine Start pro-
cedure can be used again.
CANCELING A REMOTE ENGINE
START
To cancel a Remote Engine Start, perform
one of the following:
• Aim the Intelligent Key at the vehicle and press
until the parking lights turn off.
• Turn on the hazard warning flashers.
• Cycle the ignition switch on and then off.
• The extended engine run time has ex- pired.
• The first 10 minute timer has expired.
• The engine hood has been opened.
• The shif t lever is moved out of park.
• The alarm sounds due to illegal entry into the vehicle.
• The ignition switch is pushed without an Intelligent Key in the vehicle.
• The ignition switch is pushed with an In- telligent Key in the vehicle but the brake
pedal is not depressed.
Pre-driving checks and adjustments3-21

CONDITIONS THE REMOTE ENGINE
START WILL NOT WORK
The Remote Engine Start will not operate if
any of the following conditions are present:
• “Remote Engine Start” is turned off in the“Vehicle Settings” menu of the vehicle in-
formation display.
• The ignition switch is placed in the ON position.
• The hood is not securely closed.
• The hazard indicator lights are on.
• The engine is still running. The engine must be completely stopped. Wait at
least 6 seconds if the engine goes from
running to off. This is not applicable when
extending engine run time.
• The
button is not pressed and held
for at least 2 seconds.
• The
button is not pressed and held
within 5 seconds of pressing the lock but-
ton.
• The brake is pressed.
• The doors are not closed and locked.
• The trunk is open.
• The Key System Error warning shows in the vehicle information display.
• The alarm sounds due to illegal entry into the vehicle. • Two Remote Engine Starts, or a single
Remote Engine Start with an extension,
have already been used.
• The vehicle is not in P (Park).
• There is a detected registered key already inside of the vehicle.
• The Remote Engine Start function has been switched to the OFF position in “Ve-
hicle Settings” of the vehicle information
display. For additional information, refer
to “Vehicle information display” in the “In-
struments and controls” section of this
manual.
The Remote Engine Start may display a
warning or indicator in the vehicle informa-
tion display. For additional information, re-
fer to “Vehicle information display” in the
“Instruments and controls” section of this
manual.
3-22Pre-driving checks and adjustments

1. Pull the hood lock release handleO1lo-
cated on the lower door pillar until the
hood springs up slightly.
2. Locate the lever
O2in between the hood
and grille and push the lever sideways
with your fingertips.
3. Raise the hood
O3.
4. Remove the support rod
O4and insert it
into the slot marked by an arrow
O5.
NOTE:
Do not place the support rod in a location
other than the designated slot. Hold the coated parts
OAwhen removing
or resetting the support rod. Avoid direct
contact with the metal parts, as they
may be hot immediately af ter the engine
has been stopped.
When closing the hood, return the support
rod to its original position, lower the hood
to approximately 12 in (30 cm) above the
latch and release it. This allows proper en-
gagement of the hood latch.
Pre-driving checks and adjustments3-23

•Do not stop or park the vehicle over
flammable materials such as dry
grass, waste paper or rags. They may
ignite and cause a fire.
CAUTION
• Do not use leaded gasoline. Deposits
from leaded gasoline will seriously
reduce the three-way catalyst's abil-
ity to help reduce exhaust pollutants.
• Keep your engine tuned up. Malfunc-
tions in the ignition, fuel injection, or
electrical systems can cause overrich
fuel flow into the three-way catalyst,
causing it to overheat. Do not keep
driving if the engine misfires, or if no-
ticeable loss of performance or other
unusual operating conditions are de-
tected. Have the vehicle inspected
promptly. It is recommended that
you visit a NISSAN dealer for this
service.
• Avoid driving with an extremely low
fuel level. Running out of fuel could
cause the engine to misfire, damag-
ing the three-way catalyst.
• Do not race the engine while warm-
ing it up. •
Do not push or tow your vehicle to
start the engine.
TIRE PRESSURE MONITORING
SYSTEM (TPMS)
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recom-
mended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure
label. (If your vehicle has tires of a different
size than the size indicated on the vehicle
placard or tire inflation pressure label, you
should determine the proper tire inflation
pressure for those tires.)
As an added safety feature, your vehicle
has been equipped with a Tire Pressure
Monitoring System (TPMS) that illuminates
a low tire pressure telltale when one or
more of your tires is significantly under-
inflated. Accordingly, when the low tire
pressure telltale illuminates, you should
stop and check your tires as soon as pos-
sible, and inflate them to the proper pres-
sure. Driving on a significantly under-
inflated tire causes the tire to overheat and
can lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life,
and may affect the vehicle’s handling and
stopping ability. Please note that the TPMS is not a substi-
tute for proper tire maintenance, and it is
the driver’s responsibility to maintain cor-
rect tire pressure, even if under-inflation
has not reached the level to trigger illumi-
nation of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate
when the system is not operating properly.
The TPMS malfunction indicator is com-
bined with the low tire pressure telltale.
When the system detects a malfunction,
the telltale will flash for approximately one
minute and then remain continuously illu-
minated. This sequence will continue upon
subsequent vehicle start-ups as long as
the malfunction exists. When the malfunc-
tion indicator is illuminated, the system
may not be able to detect or signal low tire
pressure as intended. TPMS malfunctions
may occur for a variety of reasons, includ-
ing the installation of replacement or alter-
nate tires or wheels on the vehicle that
prevent the TPMS from functioning prop-
erly. Always check the TPMS malfunction
telltale af ter replacing one or more tires or
wheels on your vehicle to ensure that the
replacement or alternate tires and wheels
allow the TPMS to continue to function
properly.
Starting and driving5-5

NISSAN VEHICLE IMMOBILIZER
SYSTEM
The NISSAN Vehicle Immobilizer System
will not allow the engine to start without
the use of the registered key.
If the engine fails to start using a registered
key (for example, when interference is
caused by another registered key, an auto-
mated toll road device or automatic pay-
ment device on the key ring), restart the
engine using the following procedure:
1. Leave the ignition switch in the ON posi-tion for approximately 5 seconds.
2. Place the ignition switch in the OFF or LOCK position, and wait approximately
10 seconds.
3. Repeat steps 1 and 2.
4. Restart the engine while holding the de- vice (which may have caused the inter-
ference) separate from the registered
key.
If the no start condition re-occurs, NISSAN
recommends placing the registered key on
a separate key ring to avoid interference
from other devices. • Make sure the area around the vehicle is
clear.
• Check fluid levels such as engine oil, cool- ant, brake and clutch fluid (if so equipped),
and windshield-washer fluid as fre-
quently as possible, or at least whenever
you refuel.
• Check that all windows and lights are clean.
• Visually inspect tires for their appearance and condition. Also check tires for proper
inflation.
• Lock all doors.
• Position seat and adjust head restraints/ headrests.
• Adjust inside and outside mirrors.
• Fasten seat belts and ask all passengers to do likewise.
• Check the operation of warning lights when the ignition switch is placed in the
ON position. For additional information,
refer to “Warning lights, indicator lights
and audible reminders” in the “Instru-
ments and controls” section of this
manual. 1. Apply the parking brake.
2.
Continuously Variable Transmission
model:
Move the shif t lever to P (Park) or N (Neu-
tral). P (Park) is recommended.
The starter is designed not to operate
if the shif t lever is in any of the driving
positions.
Manual Transmission (M/T) model:
Move the shif t lever to N (Neutral). De-
press the clutch pedal to the floor.
The starter is designed not to operate
unless the clutch pedal is fully de-
pressed.
3. Push the ignition switch to the ON posi- tion. Depress the brake pedal and the
clutch pedal (if so equipped) and push
the ignition switch to start the engine.
To start the engine immediately, push
and release the ignition switch while de-
pressing the brake pedal with the igni-
tion switch in any position.
• If the engine is very hard to start in extremely cold weather or when re-
starting, depress the accelerator
pedal a little (approximately 1/3 to the
BEFORE STARTING THE ENGINE STARTING THE ENGINE
5-14Starting and driving

OFF position:
For normal driving and fuel economy, use
the OFF position.
ON position:
For driving up or down long slopes where
engine braking is necessary, or for powerful
acceleration, use the ON position. The
transmission will automatically select a dif-
ferent gear ratio, allowing the engine to
provide high output.
Remember not to drive at high speeds for
extended periods of time with the drive
sport mode in the ON position. This re-
duces fuel economy.
Accelerator downshif t
— in D (Drive) position —
For passing or hill climbing, depress the
accelerator pedal to the floor. This shif ts
the transmission down into a lower gear,
depending on the vehicle speed.
Fail-safe
If the vehicle is driven under extreme
conditions, such as excessive wheel
spinning and subsequent hard braking,
the fail-safe system may be activated.
The Malfunction Indicator Light (MIL)may come on to indicate the fail-safe
mode is activated. For additional infor-
mation, refer to “Malfunction Indicator
Light (MIL)” in the “Instruments and con-
trols” section of this manual. This will oc-
cur even if all electrical circuits are func-
tioning properly. In this case, place the
ignition switch in the OFF position and
wait for 10 seconds. Then push the
switch back to the ON position. The ve-
hicle should return to its normal operat-
ing condition. If it does not return to its
normal operating condition, have the
transmission checked and repaired, if
necessary. It is recommended that you
visit a NISSAN dealer for this service.
WARNING
When the high fluid temperature pro-
tection mode or fail-safe operation oc-
curs, vehicle speed may be gradually
reduced. The reduced speed may be
lower than other traffic, which could in-
crease the chance of a collision. Be es-
pecially careful when driving. If neces-
sary, pull to the side of the road at a safe
place and allow the transmission to re-
turn to normal operation, or have it re-
paired if necessary.
MANUAL TRANSMISSION (if so
equipped)
CAUTION
• Do not rest your foot on the clutch
pedal while driving. This may cause
clutch damage.
• Fully depress the clutch pedal before
shif ting to help prevent transmission
damage.
• Stop your vehicle completely before
shif ting into R (Reverse).
Starting and driving5-21