2021 FORD EXPLORER catalytic converter

Starting a Gasoline Engine
.......................173
Starting a Hybrid Electric Vehicle System ........................................................................\
.
176
Engine Block Heater ...................................
178
Unique Driving Characteristics
Auto-Start-Stop ..........................................
180
Hybrid Vehicle Operation .........................
182
Hybrid Vehicle Frequently Asked Questions ...................................................
184
Fuel and Refueling
Safety Precautions .....................................
185
Fuel Quality - E85 .......................................
185
Fuel Quality - Gasoline ..............................
187
Fuel Filler Funnel Location .......................
187
Running Out of Fuel ....................................
187
Refueling - Excluding: Hybrid Electric Vehicle (HEV) ...........................................
189
Refueling - Hybrid Electric Vehicle (HEV) ........................................................................\
.
192
Fuel Consumption ......................................
194
Engine Emission Control
Emission Law ................................................
196
Catalytic Converter .....................................
197
High Voltage Battery
General Information - Hybrid Electric Vehicle (HEV) ..........................................
200
Transmission
Automatic Transmission ..........................
201
Four-Wheel Drive
Principle of Operation ...............................
207
Using Four-Wheel Drive ...........................
207
Rear Axle
Limited Slip Differential ............................
213Brakes
General Information
...................................
214
Hints on Driving With Anti-Lock Brakes ........................................................................\
.
215
Electric Parking Brake ................................
215
Hill Start Assist ..............................................
217
Auto Hold ........................................................
218
Reverse Braking Assist
What Is Reverse Braking Assist .............
220
Reverse Braking Assist Precautions .....
220
Switching Reverse Braking Assist On and Off ..................................................................
221
Overriding Reverse Braking Assist .........
221
Reverse Braking Assist Indicators ..........
221
Reverse Braking Assist – Troubleshooting ......................................
222
Traction Control
Principle of Operation ...............................
224
Using Traction Control ..............................
224
Stability Control
Principle of Operation ...............................
225
Using Stability Control ..............................
226
Hill Descent Control
What Is Hill Descent Control ..................
228
Switching Hill Descent Control On and Off ................................................................
228
Setting the Hill Descent Speed .............
228
Hill Descent Control Indicator ................
229
Parking Aids
Principle of Operation ...............................
230
Rear Parking Aid ..........................................
230
Front Parking Aid .........................................
232
Side Sensing System .................................
234
Active Park Assist .......................................
235
Rear View Camera ......................................
238
4
Explorer (CTW), enUSA, Edition date: 202007, Second-Printing Table of Contents

Normally, it illuminates until the engine is
cranked and automatically turns off if no
system errors are present. However, if after
15 seconds it flashes eight times, this
indicates that your vehicle is not ready for
Inspection and Maintenance (I/M) testing.
See Catalytic Converter (page 197).
If it illuminates when the engine is running
this indicates a system error. The On Board
Diagnostics system has detected an error
in the vehicle emission control system.
If it flashes, engine misfire may be
occurring. Continuing to drive your vehicle
may cause reduced power or the engine
to stop. Failure to respond to the warning
lamp may cause component damage not
covered by the vehicle Warranty. Have
your vehicle checked as soon as possible.
Stability Control It flashes when the system is
active. If it remains illuminated
or does not illuminate when you
switch the ignition on, this indicates a
system error. During a system error the
system switches off. Have the system
checked by an authorized dealer
immediately. See
Using Stability
Control (page 226).
Stability Control Off Illuminates when you switch the
system off. It goes out when you
switch the system back on or
when you switch the ignition off.
AUDIBLE WARNINGS AND
INDICATORS
Key in Ignition Warning Chime
Sounds when you open the driver's door
and you have left the key in the ignition. Keyless Warning Alert
(If Equipped)
Sounds the horn twice when you exit your
vehicle with the intelligent access key, after
the last door is closed and your keyless
vehicle is in RUN, indicating your vehicle is
still on.
Headlamps On Warning Chime
Sounds when you remove the key from the
ignition and open the driver's door and you
have left the headlamps or parking lamps
on.
Parking Brake On Warning Chime
Sounds when you have left the parking
brake on and drive your vehicle. If the
warning chime remains on after you have
released the parking brake, have the
system checked by an authorized dealer
immediately.
111
Explorer (CTW), enUSA, Edition date: 202007, Second-Printing Instrument ClusterE138639 E130458

•
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.
CATALYTIC CONVERTER WARNING:
Do not park, idle or
drive your vehicle on dry grass or other
dry ground cover. The emission system
heats up the engine compartment and
exhaust system, creating the risk of fire. WARNING:
The normal operating
temperature of the exhaust system is
very high. Never work around or attempt
to repair any part of the exhaust system
until it has cooled. Use special care when
working around the catalytic converter.
The catalytic converter heats up to a very
high temperature after only a short
period of engine operation and stays hot
after the engine is switched off. WARNING:
Exhaust leaks may
result in entry of harmful and potentially
lethal fumes into the passenger
compartment. If you smell exhaust
fumes inside your vehicle, have your
vehicle inspected immediately. Do not
drive if you smell exhaust fumes.
Your vehicle has various emission control
components and a catalytic converter that
enables it to comply with applicable
exhaust emission standards.
To make sure that the catalytic converter
and other emission control components
continue to work properly:
• Do not crank the engine for more than
10 seconds at a time.
• Do not run the engine with a spark plug
lead disconnected.
• Do not push-start or tow-start your
vehicle. Use booster cables. See Jump
Starting the Vehicle
(page 300).
• Use only the specified fuel listed.
• Do not switch the ignition off when your
vehicle is moving.
• Avoid running out of fuel.
• Have the items listed in scheduled
maintenance information performed
according to the specified schedule.
Note: Resulting component damage may
not be covered by the vehicle Warranty.
The scheduled maintenance items listed
in scheduled maintenance information are
essential to the life and performance of
your vehicle and to its emissions system.
If you use anything other than Ford,
Motorcraft or Ford-authorized parts for
maintenance replacements or for service
of components affecting emission control,
such non-Ford parts should be equivalent
to genuine Ford Motor Company parts in
performance and durability.
197
Explorer (CTW), enUSA, Edition date: 202007, Second-Printing Engine Emission Control

Blind Spot Information System.............264
Blind Spot Information System with Trailer
Tow.................................................................... 266
Switching the System On and Off..............268
System Errors...................................................... 268
Using the Blind Spot Information System.............................................................. 265
BLIS See: Blind Spot Information System.........264
Body Styling Kits.........................................350
Bonnet Lock See: Opening and Closing the Hood...........322
Booster Seats..................................................33 Types of Booster Seats...................................... 33
Brake Fluid Check........................................335 Brake Fluid Service Interval........................... 336
Brakes...............................................................214 General Information.......................................... 214
Breaking-In....................................................296 Brakes and Clutch............................................. 296
Tires........................................................................\
296
Bulb Specification Chart...........................419
C
Canceling the Set Speed..........................245
Capacities and Specifications - 2.3L EcoBoost™..................................................391
Air Conditioning System.................................. 391
Alternative Engine Oil for Extremely Cold Climates........................................................... 394
Automatic Transmission................................. 392
Engine Coolant................................................... 393
Engine Oil.............................................................. 393
Front Axle............................................................. 396
Fuel Tank.............................................................. 395
Grease.................................................................... 395
Hydraulic Brake System.................................. 395
Locks...................................................................... 395
Rear Axle............................................................... 397
Transfer Case...................................................... 396
Washer Reservoir............................................... 397
Capacities and Specifications - 3.0L................................................................398
Air Conditioning System................................. 398
Alternative Engine Oil for Extremely Cold Climates............................................................ 401
Automatic Transmission................................ 399Engine Coolant..................................................
400
Engine Oil............................................................. 400
Front Axle............................................................. 403
Fuel Tank.............................................................. 402
Grease.................................................................... 402
Hydraulic Brake System.................................. 402
Locks...................................................................... 402
Rear Axle.............................................................. 404
Transfer Case...................................................... 403
Washer Reservoir.............................................. 404
Capacities and Specifications - 3.3L, Gasoline.......................................................405
Air Conditioning System................................. 405
Alternative Engine Oil for Extremely Cold Climates.......................................................... 408
Automatic Transmission................................ 406
Engine Coolant................................................... 407
Engine Oil.............................................................. 407
Front Axle.............................................................. 410
Fuel Tank.............................................................. 409
Grease................................................................... 409
Hydraulic Brake System................................. 409
Locks...................................................................... 409
Rear Axle................................................................. 411
Transfer Case....................................................... 410
Washer Reservoir................................................. 411
Capacities and Specifications - 3.3L, Hybrid Electric Vehicle (HEV)...............412
Air Conditioning System................................... 412
Alternative Engine Oil for Extremely Cold Climates............................................................ 415
Automatic Transmission.................................. 413
Engine Coolant.................................................... 414
Engine Oil.............................................................. 414
Front Axle............................................................... 417
Fuel Tank............................................................... 416
Grease..................................................................... 416
Hydraulic Brake System................................... 416
Locks....................................................................... 416
Rear Axle................................................................ 418
Transfer Case........................................................ 417
Washer Reservoir................................................ 418
Capacities and Specifications................382
Cargo Nets
.....................................................280
Car Wash See: Cleaning the Exterior.............................. 344
Catalytic Converter......................................197 On-Board Diagnostics (OBD-II)................... 198
561
Explorer (CTW), enUSA, Edition date: 202007, Second-Printing Index