2021 FORD MUSTANG check engine light

Make sure to change your 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 a Ford-approved flushing
chemical.
Owner Checks and Services
Make sure you perform the following basic
maintenance checks and inspections every
month or at six-month intervals.Check every month
Engine oil level.
For severe use, high engine speed and engine loads, engine braking and track use, check engine oil level every fuel fill-up.
Function of all interior and exterior lights.
Tires, including spare, for wear and proper pressure. Windshield washer fluid level. 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.
Seatbelts and seat latches for wear and function.
Safety warning lamps operation for brake, ABS, airbag and seatbelt.
Washer spray and wiper operation. Clean or replace blades as necessary.
443
Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Scheduled Maintenance

Rev Match............................................................
208
Selectable Drive Modes.................................. 206
Selectable Steering.......................................... 208
Driver Alert.......................................................191
Using Driver Alert................................................. 191
Driver and Passenger Airbags...................49 Children and Airbags.......................................... 50
Proper Driver and Front Passenger Seating Adjustment........................................................ 49
Driver and Passenger Knee Airbags........54
Driving Aids
......................................................191
Driving at High Speed.................................333
Driving Hints...................................................229
Driving Through Water
...............................230
DRL See: Daytime Running Lamps - Vehicles With:
Configurable Daytime Running
Lamps.................................................................. 82
See: Daytime Running Lamps - Vehicles With: Daytime Running Lamps (DRL)................82
E
Economical Driving
.....................................229
Electromagnetic Compatibility..............483
Emission Law.................................................160 Tampering With a Noise Control
System.............................................................. 160
Enabling Remote Start
...............................124
End User License Agreement.................486 VEHICLE SOFTWARE END USER LICENSE
AGREEMENT (EULA) ................................ 486
Engine Block Heater....................................150 Using the Engine Block Heater....................... 151
Engine Coolant Check
...............................264
Adding Coolant.................................................. 264
Coolant Change................................................. 266
Engine Coolant Temperature Management.................................................. 267
Fail-Safe Cooling............................................... 266
Recycled Coolant............................................... 265
Severe Climates................................................. 266
Engine Emission Control...........................160
Engine Immobilizer See: Passive Anti-Theft System.....................73
Engine Oil Check...........................................261 Adding Engine Oil............................................... 261
Engine Oil Dipstick
.......................................261 Engine Specifications - 2.3L
EcoBoost™.................................................335
Drivebelt Routing............................................... 335
Engine Specifications - 5.0L, Mach 1........................................................................\
335
Drivebelt Routing............................................... 336
Engine Specifications - 5.0L....................337 Drivebelt Routing................................................ 337
Entertainment...............................................401 AM/FM Radio...................................................... 402
Apps........................................................................\
410
CD........................................................................\
... 408
HD Radio ™ Information (If
Available)........................................................ 405
SiriusXM® Satellite Radio (If Activated)....................................................... 403
Sources.................................................................. 401
Stereo or USB..................................................... 409
Supported Media Players, Formats and Metadata Information................................. 410
USB Ports.............................................................. 410
Environment.....................................................22
Essential Towing Checks..........................220 Before Towing a Trailer.................................... 220
Hitches................................................................... 220
Launching or Retrieving a Boat or Personal Watercraft (PWC)......................................... 221
Safety Chains...................................................... 220
Trailer Brakes....................................................... 220
Trailer Lamps....................................................... 220
When Towing a Trailer....................................... 221
Event Data Recording See: Data Recording............................................. 15
Export Unique Options
..................................21
Extending the Remote Start Duration.........................................................124
Exterior Mirrors
................................................87
Blind Spot Monitor.............................................. 88
Fold-Away Exterior Mirrors............................... 87
Heated Exterior Mirrors...................................... 87
Integrated Blind Spot Mirrors........................... 87
Memory Mirrors..................................................... 87
Power Exterior Mirrors........................................ 87
Projection Lights................................................... 87
Signal Indicator Mirrors...................................... 87
517
Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Index

Installing Child Restraints - Vehicles
With: SVT Performance Package.........34
Rear Seat Delete................................................... 34
Installing Child Restraints - Vehicles Without: SVT Performance
Package..........................................................28
Child Seats.............................................................. 28
Using Lap and Shoulder Belts......................... 28
Using Lower Anchors and Tethers for CHildren (LATCH)............................................. 31
Using Tether Straps............................................. 32
Instrument Cluster
........................................90
Instrument Lighting Dimmer......................81
Instrument Panel
............................................23
Interior Air Quality.........................................133
Interior Lamps
.................................................83
Interior Luggage Compartment Release............................................................72
Interior Mirror...................................................88 Auto-Dimming Mirror......................................... 88
Introduction........................................................9
J
Jump Starting the Vehicle........................234 Connecting the Jumper Cables.................... 234
Installing the Battery Shield.......................... 236
Preparing Your Vehicle..................................... 234
Removing the Battery Shield........................ 234
Removing the Jumper Cables....................... 235
Starting the Engine........................................... 235
K
Keyless Starting
.............................................147
Ignition Modes...................................................... 147
Keys and Remote Controls.........................58
L
Lane Keeping System.................................192 Switching the System On and Off...............193
Lighting Control
..............................................80
Flashing the Headlamp High Beam...............81
Headlamp High Beam....................................... 80
Lighting
..............................................................80
General Information........................................... 80Limited Slip Differential.............................170
Traction-Lok ™ and TORSEN™ Axles.........170
Load Carrying.................................................213
Load Limit........................................................213 Special Loading Instructions - for all
vehicles............................................................... 217
Vehicle Loading - with and without a Trailer.................................................................. 213
Locating the Cabin Air Filter.....................133
Locking and Unlocking.................................67 Activating Intelligent Access........................... 68
Autolock.................................................................. 69
Battery Saver.......................................................... 72
Illuminated Entry.................................................... 71
Illuminated Exit...................................................... 72
Locking and Unlocking the Doors with the Key Blade............................................................ 70
Opening the Luggage Compartment.............71
Power Door Locks................................................. 67
Remote Control..................................................... 67
Smart Unlocks...................................................... 69
Lug Nuts See: Changing a Road Wheel....................... 328
M
Maintenance.................................................256 General Information......................................... 256
Manual Climate Control
.............................127
Directing the Airflow........................................... 127
Setting the Blower Motor Speed...................127
Setting the Temperature.................................. 127
Switching Maximum Air Conditioning On and Off............................................................... 128
Switching Maximum Defrost On and Off........................................................................\
128
Switching Recirculated Air On and Off........................................................................\
128
Switching the Air Conditioning On and Off........................................................................\
127
Switching the Climate Control On and Off........................................................................\
128
Manual Seats
.................................................136
Manual Transmission Fluid Check - 6-Speed Manual Transmission –
3160...............................................................268
520
Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Index

Phone Controls...................................................
379
Phone Voice Commands................................ 378
Using Traction Control................................174 Switching the System Off ............................... 174
System Indicator Lights and Messages........................................................... 174
Using Voice Recognition............................376
Audio Voice Commands................................. 395
Climate Voice Commands............................. 396
Initiating a Voice Session................................ 376
Mobile App Voice Commands...................... 399
Navigation Voice Commands.......................398
Phone Voice Commands............................... 396
SiriusXM Traffic and Travel Link Voice Commands.................................................... 400
System Interaction and Feedback...............377
Voice Settings Commands........................... 400
Using Winter Tires.......................................323
Utilizing the Mediation/Arbitration Program (Canada Only)
.........................241
V
Vehicle Care
...................................................289
General Information......................................... 289
General Information - GT500/Mach 1........................................................................\
... 289
Vehicle Identification Number
................343
Vehicle Storage............................................296
Body........................................................................\
297
Brakes..................................................................... 297
Cooling system................................................... 297
Disconnecting Your 12 Volt Battery.............297
Engine..................................................................... 297
Fuel system.......................................................... 297
General.................................................................. 296
Miscellaneous..................................................... 297
Removing Vehicle From Storage.................298
Tires........................................................................\
. 297
Vehicle Wi-Fi Hotspot
...............................364
Ventilation See: Climate Control.......................................... 127
VIN See: Vehicle Identification Number............343
Voice Control....................................................75 W
Warning Lamps and Indicators................94
Adaptive Cruise Control Indicator.................94
Airbag Warning Lamp........................................ 94
Anti-Lock Brake System Warning Lamp.................................................................... 94
Automatic Headlamp High Beam Indicator .............................................................. 94
Battery ...................................................................... 94
Blind Spot Information System Indicator.............................................................. 95
Brake System Warning Lamp.......................... 95
Cruise Control Indicator..................................... 95
Direction Indicator............................................... 95
Door Ajar Warning Lamp................................... 95
Engine Coolant Temperature Warning Lamp
.................................................................... 95
Fasten Seatbelt Warning Lamp.....................95
Front Fog Lamp Indicator................................. 95
Headlamp High Beam Indicator....................96
Heads Up Display................................................. 95
Hood Ajar................................................................ 96
Lane Keeping System Lamp............................ 96
Launch Control..................................................... 96
Low Beam Malfunction..................................... 96
Low Fuel Level Warning Lamp....................... 96
Low Tire Pressure Warning Lamp.................. 96
Low Washer Fluid Level Warning Lamp.................................................................... 96
Oil Pressure Warning Lamp............................. 96
Parking Lamps...................................................... 96
Powertrain Fault................................................... 96
Service Engine Soon........................................... 96
Shift Indicator........................................................ 97
Stability Control and Traction Control Indicator.............................................................. 97
Stability Control and Traction Control Off Warning Lamp.................................................. 97
Trunk Ajar................................................................. 97
Washer Fluid Check.....................................274
Washers See: Cleaning the Exterior............................... 291
See: Cleaning the Exterior - Mach 1.............291
See: Wipers and Washers................................. 78
Waxing.............................................................293
Welcome Lighting..........................................83
What Is a Connected Vehicle.................360
526
Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Index