2021 LINCOLN AVIATOR check engine light

•
Drive a heavily loaded vehicle or tow a
trailer.
• Carry unnecessary weight (approximately
1 mpg [0.4 km/L] is lost for every 400 lb
[180 kilogram] of weight carried).
• Driving with the wheels out of alignment.
Conditions
• Heavily loading a vehicle or towing a
trailer may reduce fuel economy at any
speed.
• Adding certain accessories to your
vehicle (for example bug deflectors,
rollbars, light bars, running boards, ski
racks or luggage racks) may reduce fuel
economy.
• To maximize the fuel economy, drive with
the tonneau cover installed (if equipped).
• Using fuel blended with alcohol may
lower fuel economy.
• Fuel economy may decrease with lower
temperatures during the first 5–10 mi
(12–16 km) of driving.
• Driving on flat terrain offers improved fuel
economy as compared to driving on hilly
terrain. •
Transmissions give their best fuel
economy when operated in the top cruise
gear and with steady pressure on the gas
pedal.
• Four-wheel-drive operation (if equipped)
is less fuel efficient than two-wheel-drive
operation.
COLD WEATHER PRECAUTIONS
The functional operation of some
components and systems can be affected at
temperatures below approximately
-13°F
(-25°C).
BREAKING-IN
You need to break in new tires for
approximately
300 mi (480 km). During this
time, your vehicle may exhibit some unusual
driving characteristics. DRIVING THROUGH WATER WARNING:
Do not drive through
flowing or deep water as you may lose
control of your vehicle.
Note: Driving through standing water can
cause vehicle damage.
Note: Engine damage can occur if water
enters the air filter.
Before driving through standing water, check
the depth. Never drive through water that is
higher than the bottom of the front rocker
area of your vehicle.
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Aviator (CTV) Canada/United States of America, enUSA, Edition date: 202007, Second-Printing Driving Hints

1.
Remove the clips that secure the air filter
housing cover.
2. Using a screwdriver, loosen two clamps on either side of the air filter housing
cover. 3.
Gently pull the two boots back away from
the air filter housing cover.
4. Carefully lift the air filter housing cover.
5. Remove the air filter element from the air
filter housing.
6. Wipe any dirt or debris from the air filter housing and cover to make sure no dirt
gets in the engine and that you have a
good seal.
7. Install a new air filter element. Be careful
not to crimp the filter element edges
between the air filter housing and cover.
This could cause filter damage and allow
unfiltered air to enter the engine if it is
not properly seated.
8. Install the air filter housing cover.
9. Engage the clips to secure the air filter housing cover to the air filter housing.
10. Reconnect the two boots on the air filter
housing cover and torque to 3.69 lb.ft
(5 Nm). ENGINE COOLANT CHECK 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. WARNING: Do not put coolant in the
windshield washer reservoir. If sprayed on
the windshield, coolant could make it
difficult to see through the windshield. WARNING:
To reduce the risk of
personal injury, make sure the engine is
cool before unscrewing the coolant
pressure relief cap. The cooling system is
under pressure. Steam and hot liquid can
come out forcefully when you loosen the
cap slightly.
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Aviator (CTV) Canada/United States of America, enUSA, Edition date: 202007, Second-Printing MaintenanceE294778

Electrical Accessory Installation
To make sure the battery management
system works correctly, do not connect an
electrical device ground connection directly
to the battery negative post. This can cause
inaccurate measurements of the battery
condition and potential incorrect system
operation.
Note:
If you add electrical accessories or
components to the vehicle, it may adversely
affect battery performance and durability.
This may also affect the performance of
other electrical systems in the vehicle.
Remove and Reinstall the Battery
To disconnect or remove the battery, do the
following:
1. Apply the parking brake and switch the ignition off.
2. Switch all electrical equipment off, for example lights and radio.
3. Wait a minimum of two minutes before disconnecting the battery. Note:
The engine management system has
a power hold function and remains powered
for a period of time after you switch the
ignition off. This is to allow diagnostic and
adaptive tables to be stored. Disconnecting
the battery without waiting can cause
damage not covered by the vehicle
Warranty.
4. Disconnect the negative battery cable terminal.
5. Disconnect the positive battery cable terminal.
6. Remove the battery securing clamp.
7. Remove the battery.
8. To install, reverse the removal procedure.
Note: Before reconnecting the battery, make
sure the ignition remains switched off.
Note: Make sure the battery cable terminals
are fully tightened. If you disconnect or replace the vehicle
battery, you must reset the following
features:
•
Window bounce-back. See Power
Windows (page 119).
• Clock Settings.
• Pre-set radio stations.
Battery Disposal Make sure that you dispose of old
batteries in an environmentally
friendly way. Seek advice from
your local authority about recycling old
batteries.
ADJUSTING THE HEADLAMPS
Vertical Aim Adjustment
If your vehicle has been involved in a crash,
have the aim of the headlamp beam checked
by an authorized dealer.
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Aviator (CTV) Canada/United States of America, enUSA, Edition date: 202007, Second-Printing MaintenanceE107998

Body
•
Wash your vehicle thoroughly to remove
dirt, grease, oil, tar or mud from exterior
surfaces, rear-wheel housing and the
underside of front fenders.
• Periodically wash your vehicle if it is
stored in exposed locations.
• Touch-up exposed or primed metal to
prevent rust.
• Cover chrome and stainless steel parts
with a thick coat of auto wax to prevent
discoloration. Re-wax as necessary when
you wash your vehicle.
• Lubricate all hood, door and luggage
compartment hinges and latches with a
light grade oil.
• Cover interior trim to prevent fading.
• Keep all rubber parts free from oil and
solvents. Engine
•
Change the engine oil and filter prior to
storage because used engine oil contains
contaminates which may cause engine
damage.
• Start the engine every 15 days for a
minimum of 15 minutes. Run at fast idle
with the climate controls set to defrost
until the engine reaches normal
operating temperature.
• With your foot on the brake, shift through
all the gears while the engine is running.
• We recommend that you change the
engine oil before you use your vehicle
again.
Fuel system
• Fill the fuel tank with high-quality fuel
until the first automatic shutoff of the fuel
pump nozzle. Cooling system
•
Protect against freezing temperatures.
• When removing your vehicle from
storage, check coolant fluid level.
Confirm that there are no cooling system
leaks and that fluid is at the
recommended level.
Disconnecting Your 12 Volt Battery
• Check and recharge as necessary. Keep
connections clean.
• If storing your vehicle for more than 30
days without recharging the battery, we
recommend that you disconnect the
battery cables to maintain battery charge
for quick starting.
Note: It is necessary to reset memory
features if you disconnect the battery cables.
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Aviator (CTV) Canada/United States of America, enUSA, Edition date: 202007, Second-Printing Vehicle Care

Check Every Month
Engine oil level.
Function of all interior and exterior lights.
Tires (including spare) for wear and proper pressure. Windshield washer fluid level.
Holes and slots in the tail pipe to make sure they are functional and clear of debris. Check Every Six Months
Battery connections. Clean if necessary.
Body and door drain holes for obstructions. Clean if necessary. Cooling system fluid level and coolant strength.
Door weatherstrips for wear. Lubricate if necessary.
Hinges, latches and outside locks for proper operation. Lubricate if necessary. Parking brake for proper operation.
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Aviator (CTV) Canada/United States of America, enUSA, Edition date: 202007, Second-Printing Scheduled Maintenance

Ventilation
See: Climate Control..........................................168
VIN See: Vehicle Identification Number...............450
Voice Control
.................................................102
W
Warning Lamps and Indicators..................129 Adaptive Cruise Control....................................129
Anti-Lock Braking System.................................129
Auto Hold Active.................................................129
Auto Hold Unavailable.......................................129
Automatic High Beam Control.........................129
Auto Start-stop.....................................................129
Battery....................................................................129
Blind Spot Monitor..............................................129
Brake System Warning Lamp...........................
130
Cruise Control......................................................130
Direction Indicator...............................................130
Distance Alert.......................................................130
Door Ajar...............................................................130
Electric Park Brake..............................................130
Engine Oil...............................................................131
Engine or Motor Coolant Temperature..........130
Fasten Rear Seatbelt...........................................131
Fasten Seatbelt.....................................................131
Front Airbag...........................................................131 Front Fog Lamps...................................................131
High Beam..............................................................131
Hill Descent............................................................131
Hood Ajar...............................................................131
Lamps On...............................................................131
Liftgate Ajar............................................................131
Low Beam Warning..............................................131
Low Fuel Level......................................................131
Low Tire Pressure Warning...............................132
Low Washer Fluid................................................132
Powertrain Fault...................................................132
Ready to Drive......................................................132
Service Engine Soon..........................................132
Stability Control....................................................132
Stability Control Off.............................................132
Stop Safely Now..................................................133
Tow Haul Indicator..............................................133
Vehicle Plugged in..............................................133
Washer Fluid Check.....................................401
Washers See: Cleaning the Exterior...............................405
See: Wipers and Washers.................................105
Waxing............................................................406
Welcome Lighting..........................................114 Switching the Welcome Lighting On or
Off........................................................................\
114
What Is 911 Assist
............................................64 What Is Adaptive Cruise Control With Lane
Centering......................................................291
What Is Auto Air Refresh.............................175
What Is Automatic High Beam Control............................................................117
What Is Cruise Control................................289 Requirements......................................................289
What Is Drive Mode Control......................329
What Is Hill Descent Control
.....................270
What Is Intelligent Adaptive Cruise Control
...........................................................291
What Is Phone As a Key................................72
What Is Reverse Braking Assist................263
What Is the Cabin Air Filter.........................175
What is the Rear Occupant Alert System...........................................................195
Wheel Nuts See: Changing a Road Wheel.........................434
Wheels and Tires...........................................413 General Information............................................413
Technical Specifications...................................442
Windows and Mirrors....................................119
Windshield Washers.....................................107 Front Camera Washer........................................107
Windshield Wipers - Vehicles With: Heated Wiper Blades...............................................106
Heated Wiper Blade...........................................106
663
Aviator (CTV) Canada/United States of America, enUSA, Edition date: 202007, Second-Printing Index