check engine LINCOLN NAUTILUS 2021 Owner's Guide

Fail-Safe Cooling
Fail-safe cooling allows you to temporarily
drive your vehicle before any incremental
component damage occurs. The fail-safe
distance depends on ambient temperature,
vehicle load and terrain.
How Fail-Safe Cooling Works
If the engine begins to overheat,
the coolant temperature gauge
moves toward the red zone:
A warning lamp illuminates and a
message may appear in the
information display.
If the engine reaches a preset
over-temperature condition, the engine
automatically switches to alternating cylinder
operation. Each disabled cylinder acts as an
air pump and cools the engine.
When this occurs, your vehicle still operates,
however:
• Engine power is limited.
• The air conditioning system turns off. Continued operation increases the engine
temperature, causing the engine to
completely shut down. Your steering and
braking effort increases in this situation.
When the engine temperature cools, you can
re-start the engine. Have your vehicle
checked as soon as possible to minimize
engine damage.
When Fail-Safe Mode Is Activated
WARNING: Fail-safe mode is for use
during emergencies only. Operate your
vehicle in fail-safe mode only as long as
necessary to bring your vehicle to rest in
a safe location and seek immediate repairs.
When in fail-safe mode, your vehicle will
have limited power, will not be able to
maintain high-speed operation, and may
completely shut down without warning,
potentially losing engine power, power
steering assist, and power brake assist,
which may increase the possibility of a
crash resulting in serious injury. WARNING: Do not remove the
coolant reservoir cap when the engine is
on or the cooling system is hot. Wait 10
minutes for the cooling system to cool
down. Cover the coolant reservoir cap with
a thick cloth to prevent the possibility of
scalding and slowly remove the cap.
Failure to follow this instruction could result
in personal injury.
Your vehicle has limited engine power when
in the fail-safe mode, drive your vehicle with
caution. Your vehicle does not maintain
high-speed operation and the engine could
operate poorly.
Remember that the engine is capable of
automatically shutting down to prevent
engine damage. In this situation:
1. Pull off the road as soon as safely possible and switch the engine off.
2. If you are a member of a roadside assistance program, we recommend that
you contact your roadside assistance
service provider.
342
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Maintenance

3. If this is not possible, wait for a short
period of time for the engine to cool.
4. Check the coolant level. If the coolant level is at or below the minimum mark,
add prediluted coolant immediately.
5. When the engine temperature cools, you
can re-start the engine. Have your vehicle
checked as soon as possible to minimize
engine damage.
Note: Driving your vehicle without repair
increases the chance of engine damage.
Engine Coolant Temperature
Management (If Equipped) WARNING:
To reduce the risk of
crash and injury, be prepared that the
vehicle speed may reduce and the vehicle
may not be able to accelerate with full
power until the coolant temperature
reduces. If you tow a trailer with your vehicle, the
engine may temporarily reach a higher
temperature during severe operating
conditions, for example ascending a long or
steep grade in high ambient temperatures.
At this time, you may notice the coolant
temperature gauge moves toward the red
zone and a message may appear in the
information display.
You may notice a reduction in vehicle speed
caused by reduced engine power in order
to manage the engine coolant temperature.
Your vehicle may enter this mode if certain
high-temperature and high-load conditions
take place. The amount of speed reduction
depends on vehicle loading, grade and
ambient temperature. If this occurs, there is
no need to stop your vehicle. You can
continue to drive.
The air conditioning may automatically turn
on and off during severe operating
conditions to protect the engine from
overheating. When the coolant temperature
decreases to the normal operating
temperature, the air conditioning turns on. If the coolant temperature gauge moves fully
into the red zone, or if the coolant
temperature warning or service engine soon
messages appear in your information display,
do the following:
1.
Stop your vehicle as soon as it is safe to
do so. Fully apply the parking brake, shift
into park (P) or neutral (N).
2. Leave the engine running until the coolant temperature gauge needle
returns to the normal position. If the
temperature does not drop after several
minutes, follow the remaining steps.
3. Switch the engine off and wait for it to cool. Check the coolant level.
4. If the coolant level is at or below the minimum mark, add prediluted coolant
immediately.
5. If the coolant level is normal, restart the engine and continue.
343
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Maintenance

Hybrid Battery Systems
We recommend the following actions for your
vehicle:
•
When storing your vehicle for greater
than 30 days the state of charge should
be approximately 50%. Additionally we
recommend disconnecting the 12V
battery which will reduce system loads
on the HV battery.
12 Volt Battery
• Check and recharge as necessary. Keep
connections clean.
Note: It is necessary to reset memory
features if you disconnect the battery cables.
Brakes
Make sure the brakes and parking brake
release fully.
Note: If you intend on parking your vehicle
for an extended period after cleaning the
wheels with a wheel cleaner, drive your
vehicle for a few minutes before doing so to
reduce the risk of increased corrosion of the
brake discs, brake pads and linings. Tires
•
Maintain recommended air pressure.
Note: If you intend on parking your vehicle
for an extended period after cleaning the
wheels with a wheel cleaner, drive your
vehicle for a few minutes before doing so.
This reduces the risk of corrosion of the
brake discs, brake pads and linings.
REMOVING YOUR VEHICLE FROM
STORAGE
When your vehicle is ready to come out of
storage, do the following:
• We recommend that you change the
engine oil before you use your vehicle
again.
• Wash your vehicle to remove any dirt or
grease film build-up on window surfaces.
• Check windshield wipers for any
deterioration.
• Check under the hood for any foreign
material that may have collected during
storage such as mice or squirrel nests. •
Check the exhaust for any foreign
material that may have collected during
storage.
• Check tire pressures and set tire inflation
per the Tire Label.
• Check brake pedal operation. Drive your
vehicle 15 ft (4.5 m) back and forth to
remove rust build-up.
• Check fluid levels (including coolant, oil
and gas) to make sure there are no leaks,
and fluids are at recommended levels.
• If you remove the battery, clean the
battery cable ends and check for
damage.
Contact an authorized dealer if you have any
concerns or issues.
362
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Storing Your Vehicle

VEHICLE IDENTIFICATION NUMBER
Locating the Vehicle Identification
Number
The vehicle identification number is located
on the left-hand side of the instrument panel.
In the graphic, XXXX is representative of
your vehicle identification number. Vehicle Identification Number
Overview
The vehicle identification number contains
the following information:
World manufacturer identifier.
A
Brake system, gross vehicle weight
rating, restraint devices and their
locations.
B
Make, vehicle line, series, body
type.
C
Engine or motor type.
D
Check digit.
E Model year.
F
Assembly plant.
G
Production sequence number.
H
416
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Vehicle IdentificationE311767 E142477

Transferable Coverage
If you sell your vehicle before your Lincoln
Protect extended service plan coverage
expires, you can transfer any remaining
coverage to the new owner. This should give
you and your potential buyer a little more
peace of mind.
Less Cost to Properly Maintain Your Vehicle
The Lincoln Protect extended service plan
also offers a Premium Maintenance Plan that
covers all scheduled maintenance, and
selected wear items. The coverage is
prepaid, so you never have to worry about
the cost of your vehicle
’s maintenance.
Covered maintenance includes:
• Windshield wiper blades.
• Spark plugs.
• The clutch disc (if equipped).
• Brake pads and linings.
• Shock absorbers and struts.
• Engine cooling hoses, clamps and
o-rings. •
Engine belts.
• Diesel exhaust fluid replenishment (if
equipped).
Interest Free Finance Options
Just a 10% down payment will provide you
with an affordable, no interest, no fee
payment program allowing you all the
security and benefits Lincoln Protect
extended service plan has to offer while
paying over time. You are pre-approved with
no credit check or hassles. To learn more,
call our Lincoln Protect extended service
plan specialists at 800-367-3377.
Complete the information below and mail to:
Lincoln Protect Extended Service Plan
P.O. Box 321067
Detroit, MI 48232 Lincoln Protect (Canada Only)
You can get more protection for your vehicle
by purchasing a Lincoln Protect extended
service plan. The Lincoln Protect extended
service plan is the only service contract
backed by Lincoln Motor Company of
Canada, Limited. Depending on the plan you
purchase, the Lincoln Protect extended
service plan provides benefits such as:
•
Rental reimbursement.
• Coverage for certain maintenance and
wear items.
• Protection against repair costs after your
New Vehicle Limited Warranty Coverage
expires.
• Roadside Assistance benefits.
457
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Lincoln Protect

If your information display resets prematurely
or becomes inoperative, you should perform
the oil change interval at six months or
5,000 mi (8,000 km) from your last oil
change. Never exceed one year or 10,000 mi
(16,000 km)
between oil change intervals.
You can drive high performance vehicles in
such a way that may lead to higher oil
consumption including extended time at high
engine speeds, high loads, engine braking,
hard cornering maneuvers, track and off-road
usage. Under these conditions, oil
consumption of approximately 1 quart per
500 miles (1 liter per 800 km) is possible.
Check the engine oil level at every refueling
and adjust to maintain proper levels to avoid
engine damage.
It is important to rely upon your dealership
to properly diagnose and repair your vehicle. We strongly recommend only using our
genuine or our authorized re-manufactured
replacement parts engineered for your
vehicle.
Additives and Chemicals
We do not recommend using chemicals or
additives not approved by us as part of your
vehicle
’s normal maintenance. Please consult
your warranty information.
Oils, Fluids and Flushing
In many cases, fluid discoloration is a normal
operating characteristic and, by itself, does
not necessarily indicate a concern or that the
fluid needs to be changed. Have discolored
fluids that also show signs of overheating or
foreign material contamination checked
immediately. Make sure to change the vehicle
’s oils and
fluids at the specified intervals or in
conjunction with a repair. Flushing is a viable
way to change fluid for many vehicle
sub-systems during scheduled maintenance.
It is critical that systems are flushed only with
new fluid that is the same as that required
to fill and operate the system or using our
approved flushing chemical.
Owner Checks and Services
Make sure you perform the following basic
maintenance checks and inspections. Check Every Month
The air filter restriction gauge. 1
The engine oil level.
Function of all interior and the exterior lights.
460
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Scheduled Maintenance

Check Every Six Months
The seatbelts and seat latches for wear and function.
Safety warning lamps, brake, ABS, airbag and seatbelt for operation.
The washer spray and wiper operation. Clean or replace blades as necessa\
ry.
Multi-Point Inspection
It is important to have the systems on your
vehicle regularly checked. This can help
identify potential issues and prevent major
problems. We recommend having the
following multi-point inspection performed
at every scheduled maintenance interval to
help make sure your vehicle keeps running
great. Multi-Point Inspection
Hazard warning system operation
Accessory drive belt or belts
Horn operation
Battery performance
Radiator, cooler, heater and air conditioning hoses
Engine air filter
Suspension components for leaks or damage
Exhaust system
462
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Scheduled Maintenance

Multi-Point Inspection
Steering and linkage
Exterior lamps operation
Tires including the spare for wear and proper pressure 2
Fluid levels 1
; fill if necessary
Windshield for cracks, chips or pits
For oil and fluid leaks
Washer spray and wiper operation
Half-shaft dust boots
1 Brake, coolant recovery reservoir, automatic transmission and window washer.
2 If your vehicle has a temporary mobility kit, check the tire sealant exp\
iration Use By date on the canister. Replace as needed.
Be sure to ask your dealership service
advisor or technician about the multi-point
vehicle inspection. It is a comprehensive way
to perform a thorough inspection of your
vehicle. Your checklist gives you immediate
feedback on the overall condition of your
vehicle. NORMAL SCHEDULED
MAINTENANCE
Oil Change Reminder
Your vehicle comes with an oil change
reminder that determines when you should
change the engine oil based on how you use
your vehicle.Your vehicle lets you know when an oil
change is due by displaying a message in
the information display.
The following table provides examples of
vehicle use and its impact on oil change
intervals. It is a guideline only. Actual oil
change intervals depend on several factors
and generally decrease with severity of use.
463
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Scheduled Maintenance

Axle and PTU maintenance: The Power
Transfer Unit (PTU) and rear axle (AWD only)
in your vehicle does not require any normal
scheduled maintenance. The PTU lubricant
may be more likely to require a fluid change
if the vehicle has extended periods of
extreme or severe duty cycle driving.
Changing or checking the PTU lubricant is
not necessary unless the unit has been
submerged in water, shows sign of leakage.
Contact your authorized dealer for service.
California fuel filter replacement
: If you
register your vehicle in California, the
California Air Resources Board has
determined that the failure to perform this
maintenance item does not nullify the
emission warranty or limit recall liability
before the completion of your vehicle's
useful life. We however, urge you to have all
recommended maintenance services
performed at the specified intervals and to
record all vehicle service. Engine air filter and cabin air filter
replacement
: The life of the engine air filter
and cabin air filter is dependent on exposure
to dusty and dirty conditions. Vehicles
operated in these conditions require frequent
inspection and replacement of the engine
air filter and cabin air filter.
471
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Scheduled Maintenance

Tampering With a Noise Control
System
Federal laws prohibit the following acts:
•
Removal or rendering inoperative by any
person other than for purposes of
maintenance.
• Repair or replacement of any device or
element of the design incorporated into
a new vehicle for the purpose of noise
control prior to its sale or delivery to the
ultimate purchaser or while it is in use.
• The use of the vehicle after any person
removes or renders inoperative any
device or element of the design.
The U.S. Environmental Protection Agency
may presume to constitute tampering as
follows:
• Removal of hood blanket, fender apron
absorbers, fender apron barriers,
underbody noise shields or acoustically
absorptive material.
• Tampering or rendering inoperative the
engine speed governor, to allow engine
speed to exceed manufacturer
specifications. If the engine does not start, runs rough,
experiences a decrease in engine
performance, experiences excess fuel
consumption or produces excessive exhaust
smoke, check for the following:
•
A plugged or disconnected air inlet
system hose.
• A plugged engine air filter element.
• Water in the fuel filter and water
separator.
• A clogged fuel filter.
• Contaminated fuel.
• Air in the fuel system, due to loose
connections.
• An open or pinched sensor hose.
• Incorrect engine oil level.
• Incorrect fuel for climatic conditions.
• Incorrect engine oil viscosity for climactic
conditions.
Note: Some vehicles have a lifetime fuel filter
that is integrated with the fuel tank. Regular
maintenance or replacement is not needed. Note:
If these checks do not help you correct
the concern, have your vehicle checked as
soon as possible.
Noise Emissions Warranty, Prohibited
Tampering Acts and Maintenance
On January 1, 1978, Federal regulation
became effective governing the noise
emission on trucks over 10,000 lb (4,536 kg)
Gross Vehicle Weight Rating (GVWR). The
preceding statements concerning prohibited
tampering acts and maintenance, and the
noise warranty found in the Warranty Guide,
are applicable to complete chassis cabs over
10,000 lb (4,536 kg)
GVWR.
547
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Customer Information