2020 FORD MUSTANG check engine

Load Carrying
Load Limit
.......................................................192
Towing
Towing a Trailer .............................................
197
Recommended Towing Weights ...........
198
Essential Towing Checks ..........................
199
Towing the Vehicle on Four Wheels .....
200
Convertible Top
Opening the Convertible Top .................
202
Closing the Convertible Top ...................
203
Driving Hints
Reduced Engine Performance ..............
205
Economical Driving ....................................
205
Cold Weather Precautions ......................
206
Breaking-In ...................................................
206
Driving Through Water .............................
206
Floor Mats ......................................................
207
Roadside Emergencies
Roadside Assistance ................................
208
Hazard Flashers ..........................................
209
Fuel Shutoff .................................................
209
Jump Starting the Vehicle ........................
210
Post-Crash Alert System ...........................
212
Transporting the Vehicle ...........................
213
Customer Assistance
Getting the Services You Need ...............
214
In California (U.S. Only) .............................
215
The Better Business Bureau (BBB) Auto Line Program (U.S. Only) .....................
216
Utilizing the Mediation/Arbitration Program (Canada Only) ........................
217
Getting Assistance Outside the U.S. and Canada .........................................................
217
Ordering Additional Owner's Literature ........................................................................\
.
219 Reporting Safety Defects (U.S. Only)
........................................................................\
.
219
Reporting Safety Defects (Canada Only) ........................................................................\
.
219
Fuses
Fuse Specification Chart ...........................
221
Changing a Fuse .........................................
230
Maintenance
General Information ...................................
232
Opening and Closing the Hood .............
232
Under Hood Overview - 2.3L EcoBoost™ ........................................................................\
234
Under Hood Overview - 5.0L ..................
235
Under Hood Overview - 5.0L, Bullitt ....
236
Engine Oil Dipstick ......................................
237
Engine Oil Check ..........................................
237
Oil Change Indicator Reset .....................
238
Changing the Engine Air Filter - 2.3L EcoBoost™/5.0L ....................................
239
Changing the Engine Air Filter - 5.0L, Bullitt ...........................................................
239
Engine Coolant Check ..............................
240
Manual Transmission Fluid Check .......
244
Automatic Transmission Fluid Check ........................................................................\
245
Brake Fluid Check .......................................
245
Clutch Fluid Check - Manual Transmission ............................................
246
Power Steering Fluid Check ...................
246
Changing the 12V Battery ........................
246
Adjusting the Headlamps .......................
248
Washer Fluid Check ...................................
250
Fuel Filter .......................................................
250
Checking the Wiper Blades ....................
250
Changing the Wiper Blades ....................
250
Changing a Bulb ...........................................
251
Track Use
Track Use .......................................................
252
4
Mustang (CZG) Canada/United States of America, Vehicles Built From: 15-07-2019, enUSA, Edition date: 201906, Second-Printing Table of Contents

Brake system
Cabin air filter
Check fuel cap
Child safety door lock or unlock
Child seat lower anchor
Child seat tether anchor
Cruise control
Do not open when hot
Engine air filter
Engine coolant
Engine coolant temperature
Engine oil
Explosive gas
Fan warning
Fasten seatbelt Flammable
Front airbag
Front fog lamps
Fuel pump reset
Fuse compartment
Hazard flashers
Heated rear window
Windshield defrosting system
Interior luggage compartment
release
Jack
Keep out of reach of children
Lighting control
Low tire pressure warning
Maintain correct fluid level
Note operating instructions
8
Mustang (CZG) Canada/United States of America, Vehicles Built From: 15-07-2019, enUSA, Edition date: 201906, Second-Printing IntroductionE270480 E71340 E71880 E231160 E67017 E161353

Adaptive Cruise Control Indicator
(If Equipped)
It illuminates when you switch
the system on.
It illuminates white when the
system is in standby mode. It illuminates
green when you set the adaptive cruise
speed.
See Using Adaptive Cruise Control
(page 168).
Airbag Warning Lamp If it does not illuminate when you
switch the ignition on, continues
to flash or remains on when the
engine is running, this indicates a
malfunction. Have your vehicle checked
as soon as possible.
Anti-Lock Brake System Warning
Lamp If it illuminates when you are
driving, this indicates a
malfunction. Your vehicle
continues to have normal braking without
the anti-lock brake system function. Have
your vehicle checked as soon as possible.
Automatic Headlamp High Beam
Indicator
(If Equipped) It illuminates when the system
automatically turns the
headlamp high beam on.
Battery If it illuminates while driving, it
indicates a malfunction. Switch
off all unnecessary electrical
equipment and have the system checked
by your authorized dealer immediately. Blind Spot Information System
Indicator
(If Equipped) It illuminates when you switch
the system off.
See
Blind Spot Information
System (page 179).
Brake System Warning Lamp WARNING:
Driving your vehicle
with the warning lamp on is dangerous.
A significant decrease in braking
performance may occur. It may take you
longer to stop your vehicle. Have your
vehicle checked as soon as possible.
Driving extended distances with the
parking brake engaged can cause brake
failure and the risk of personal injury.
Note: Indicators vary depending on region.
This lamp is a dual function lamp and will
illuminate when:
• You apply the parking brake with the
ignition on.
• Your vehicle has a brake fault or low
brake fluid level, regardless of parking
brake position. If the lamp illuminates when you
are moving, you may have the
parking brake applied. Make sure
the parking brake is off. Have
your vehicle checked as soon as
possible if the lamp continues to
illuminate.
Cruise Control Indicator It illuminates when you switch
the system on.
See
What Is Cruise Control
(page 167).
86
Mustang (CZG) Canada/United States of America, Vehicles Built From: 15-07-2019, enUSA, Edition date: 201906, Second-Printing Instrument ClusterE144524 E67017 E151262 E270480 E71340

Direction Indicator
It illuminates when the left or
right direction indicator or the
hazard warning flasher is turned
on. Flashes during operation. An increase
in the rate of flashing warns of a failed
indicator bulb.
Door Ajar Warning Lamp Displays when the ignition is on
and any door is not completely
closed.
Engine Coolant Temperature
Warning Lamp If it illuminates when your vehicle
is moving, this indicates that the
engine is overheating. Stop your
vehicle as soon as it is safe to do so and
switch the engine off. Have your vehicle
checked as soon as possible.
Fasten Seatbelt Warning Lamp It illuminates and a chime
sounds until you fasten the
seatbelts.
Front Fog Lamp Indicator (If Equipped) It illuminates when you switch
the front fog lamps on.
Heads Up Display (If Equipped) A red beam of lights will
illuminate on the windshield in
certain instances when using
adaptive cruise control or the collision
warning system. It will also illuminate
momentarily when you start your vehicle
to make sure the display works. Headlamp High Beam Indicator It will illuminate when you switch
the high beam headlamps on. It
will flash when you use the
headlamp flasher.
Hood Ajar It illuminates when the ignition
is on and the hood is not
completely closed.
Lane Keeping System Lamp
(If
Equipped) Illuminates when the system
activates.
Launch Control Illuminates when this feature is
ready, including both slip control
and engine RPM hold.
Illuminates when only engine
RPM hold is active. See
Track
Use (page 252).
Low Beam Malfunction Lights when there is a
malfunction with the low beam
headlamp bulb.
Low Fuel Level Warning Lamp If it illuminates when you are
driving, refuel as soon as
possible.
Low Tire Pressure Warning Lamp Illuminates when your tire
pressure is low. If the lamp
remains on with the engine
running or when driving, check your tire
pressure as soon as possible.
87
Mustang (CZG) Canada/United States of America, Vehicles Built From: 15-07-2019, enUSA, Edition date: 201906, Second-Printing Instrument Cluster E71880 E156133 E159324 E144813 E234583 E255688 E181350

It also illuminates momentarily when you
switch the ignition on to confirm the lamp
is functional. If it does not illuminate when
you switch the ignition on, or begins to
flash at any time, have the system checked
by your authorized dealer.
Low Washer Fluid Level Warning
Lamp
Illuminates when the washer
fluid is low.
Oil Pressure Warning Lamp Illuminates when you switch the
ignition on.
If it illuminates when the engine
is running this indicates a malfunction.
Stop your vehicle as soon as it is safe to
do so and switch the engine off. Check the
engine oil level. If the oil level is sufficient,
this indicates a system malfunction. Have
your vehicle checked as soon as possible.
See Engine Oil Check (page 237).
Parking Lamps Illuminate when you switch the
parking lamps on.
Powertrain Fault Illuminates when the system
detects a powertrain fault.
Contact an authorized dealer as
soon as possible.
Service Engine Soon If it illuminates when the engine
is running this indicates a
malfunction. The On Board
Diagnostics system has detected a
malfunction of the vehicle emission control
system. If it flashes, engine misfire may be
occurring. Increased exhaust gas
temperatures could damage the catalytic
converter or other vehicle components.
Drive in a moderate fashion (avoid heavy
acceleration and deceleration) and have
your vehicle immediately serviced.
It illuminates when you switch the ignition
on prior to engine start to check the bulb
and to indicate whether your vehicle is
ready for Inspection and Maintenance
(I/M) testing.
Normally, it illuminates until the engine is
cranked and automatically turns off if no
malfunctions 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 144).
Shift Indicator
(If Equipped) Illuminates to inform you that
shifting to a higher gear as
indicated may give better fuel
economy and lower CO2
emissions. It will not illuminate during
periods of high acceleration, braking or
when you press the clutch pedal.
Stability Control and Traction
Control Indicator Flashes during operation.
If it does not illuminate when you
switch the ignition on, or remains
on when the engine is running, this
indicates a malfunction. Have your vehicle
checked as soon as possible.
Note: The system automatically turns off
if there is a malfunction.
See
Using Stability Control (page 159).
See Using Traction Control (page 157).
88
Mustang (CZG) Canada/United States of America, Vehicles Built From: 15-07-2019, enUSA, Edition date: 201906, Second-Printing Instrument ClusterE132353 E138639

Exhaust Mode
Action
Message
Indicates that the exhaust state selected, through the menuor drive mode selection, is for use on the track and may not comply with local noise regulations. Only on vehicles with active exhaust.
For Track Use See
Manual
Fuel Action
Message
An early reminder of a low fuel condition.
Fuel Level Low
The fuel fill inlet may not be properly closed.
Check Fuel Fill Inlet
Hill Start Assist Action
Message
Hill start assist is not available. Contact an authorized dealer.See Hill Start Assist (page 155).
Hill Start Assist Not
Available
Keys and Intelligent Access Action
Message
A reminder to press the brake while starting the vehicle.
To START Press Brake
A reminder to depress the clutch pedal on manual transmis-sion while starting the vehicle.
To START Press Clutch
The system does not detect a key in your vehicle. See KeylessStarting
(page 131).
No Key Detected
You pressed the start/stop button to switch off the engine
and your vehicle does not detect your intelligent access key inside your vehicle.
Restart Now or Key is
Needed
Your vehicle is in the accessory ignition state.
Accessory Power is
Active
There is a problem with your vehicle ’s starting system. See
an authorized dealer for service.
Starting System Fault
104
Mustang (CZG) Canada/United States of America, Vehicles Built From: 15-07-2019, enUSA, Edition date: 201906, Second-Printing Information Displays

Action
Message
You have successfully programmed an intelligent access key to the system.
Key Program Successful
You have failed to program an intelligent access key to thesystem.
Key Program Failure
You have programmed the maximum number of keys to the system.
Max Number of Keys
Learned
You have not programmed enough keys to the system.
Not Enough Keys
Learned
The key battery is low. Change the battery as soon as possible.
Key Battery Low Replace
Soon
Inform the driver that they are exiting the vehicle and the engine is on.
Engine ON
Maintenance Action
Message
Stop your vehicle as soon as safely possible and turn off the
engine. Check the oil level. If the warning stays on or continues to come on with your engine running, contact an authorized dealer as soon as possible.
Low Engine Oil Pressure
The engine oil life remaining is 10% or less.
Change Engine Oil Soon
The oil life left is at 0%.
Oil Change Required
The brake fluid level is low, inspected the brake systemimmediately. See Brake Fluid Check (page 245).
Brake Fluid Level Low
The brake system needs servicing. Stop your vehicle in a safeplace. Contact an authorized dealer.
Check Brake System
Indicates that your vehicle is still in Transport mode. This maynot allow some features to operate properly. Contact an authorized dealer.
Transport Mode Contact
Dealer
Indicates that your vehicle is still in Factory mode. This maynot allow some features to operate properly. Contact an authorized dealer.
Factory Mode Contact
Dealer
The powertrain needs service due to a powertrain malfunction.
See Manual
105
Mustang (CZG) Canada/United States of America, Vehicles Built From: 15-07-2019, enUSA, Edition date: 201906, Second-Printing Information Displays

•
Press the brake pedal (automatic
transmission) or clutch pedal (manual
transmission), and then press the
button for any length of time. An
indicator light on the button illuminates
when the ignition is on and when the
engine starts.
STEERING WHEEL LOCK (IF
EQUIPPED)
Your vehicle has an electronically
controlled steering wheel lock that
automatically operates.
The steering wheel will lock shortly after
you have parked your vehicle and the
passive key is outside it or when you lock
your vehicle.
Note: The steering wheel will not lock when
the ignition is on or when your vehicle is
moving.
Unlocking the Steering Wheel
The steering wheel unlocks when the
system detects a valid passive key inside
your vehicle. If the steering wheel relocks,
switch the ignition on to unlock it.
Note: You may have to slightly rotate the
steering wheel to assist unlocking it.
STARTING A GASOLINE
ENGINE
When you start the engine, the idle speed
increases, this helps to warm up the
engine. If the engine idle speed does not
slow down automatically, have your
vehicle checked by an authorized dealer. Note:
You can crank the engine for a total
of 60 seconds (without the engine starting)
before the starting system temporarily
disables. The 60 seconds does not have to
be all at once. For example, if you crank the
engine three times for 20 seconds each
time, without the engine starting, you
reached the 60-second time limit. A
message appears in the information display
alerting you that you exceeded the cranking
time. You cannot attempt to start the engine
for at least 15 minutes. After 15 minutes, you
are limited to a 15-second engine cranking
time. You need to wait 60 minutes before
you can crank the engine for 60 seconds
again.
Before starting the engine, check the
following:
• Make sure all occupants have fastened
their seatbelts.
• Make sure the headlamps and
electrical accessories are off.
• Make sure the parking brake is on.
• Move the transmission selector lever
to park (P) (automatic transmission)
or neutral (manual transmission)
Note: Do not touch the accelerator pedal.
Note: You must have your intelligent access
key in the vehicle in order to shift the
transmission out of position
P.
1. Fully press the brake pedal.
2. Press the button.
The system does not function if:
• The key frequencies are jammed.
• The key battery has no charge.
If you are unable to start the engine, do the
following:
132
Mustang (CZG) Canada/United States of America, Vehicles Built From: 15-07-2019, enUSA, Edition date: 201906, Second-Printing Starting and Stopping the Engine