Ford Mustang (2018 year). Manual — part 20

Switch the ignition on. The fuel gauge will
indicate approximately how much fuel is
left in the fuel tank. The arrow adjacent to
the fuel pump symbol indicates on which
side of your vehicle the fuel filler door is
located.

The needle should move toward F when
you refuel your vehicle. If the needle points
to E after adding fuel, this indicates your
vehicle needs service soon.

After refueling some variability in needle
position is normal:

•

It may take a short time for the needle
to reach F after leaving the gas station.
This is normal and depends upon the
slope of pavement at the gas station.

•

The fuel amount dispensed into the
tank is a little less or more than the
gauge indicated. This is normal and
depends upon the slope of pavement
at the gas station.

•

If the gas station nozzle shuts off
before the tank is full, try a different
gas pump nozzle.

Low Fuel Reminder

A low fuel level reminder displays and
sounds when the distance to empty
reaches 75 mi (120 km) to empty for
MyKey, and at 50 mi (80 km), 25 mi
(40 km), 10 mi (20 km) and 0 mi (0 km)
for all vehicle keys.

Variations:
Note: The low fuel warning and distance-to-empty warning can appear at different fuel
gauge positions depending on fuel economy conditions. This variation is normal.

Fuel gauge position

Distance-to-empty

Driving type (fuel economy

conditions)

1/8th tank

50 mi (80 km)

Highway driving

1/4 tank

50 mi (80 km)

Severe duty driving (trailer

towing, extended idle)

Engine Coolant Temperature
Gauge

WARNING

Never remove the coolant reservoir
cap when the engine is running or
hot.

Indicates engine coolant temperature. At
normal operating temperature, the level
indicator will be in the normal range. If the
engine coolant temperature exceeds the
normal range, stop your vehicle as soon as
safely possible, switch off the engine and
let it cool.

Gauge Package

(If Equipped)

E196366

Oil Pressure Gauge

Indicates the engine oil pressure.

Vacuum or Vacuum and Boost Gauge

Indicates the vacuum or vacuum and boost
pressure in the intake.

WARNING LAMPS AND
INDICATORS

The following warning lamps and
indicators alert you to a vehicle condition
that may become serious. Some lamps
illuminate when you start your vehicle to
make sure they work. If any lamps remain
on after starting your vehicle, refer to the
respective system warning lamp for further
information.

Note: Some warning indicators appear in
the information display and operate the
same as a warning lamp but do not
illuminate when you start your vehicle.

Adaptive Cruise Control Indicator

(If Equipped)

E144524

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 164).

Airbag Warning Lamp

E67017

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.

See Automatic High Beam Control
(page 74).

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)

E151262

It illuminates when you switch
the system off.

See Blind Spot Information

System (page 175).

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.

E138644

It illuminates when you engage
the parking brake and the
ignition is on.

If it illuminates when your vehicle is
moving, make sure the parking brake is
disengaged. If the parking brake is
disengaged, this indicates low brake fluid
level or a brake system fault. Have your
vehicle checked as soon as possible.

Cruise Control Indicator

(If Equipped)

E71340

It illuminates when you switch
the system on.

See Using Cruise Control

(page 163).

Direction Indicator

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

E71880

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)

E156133

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

E159324

It illuminates when the ignition
is on and the hood is not
completely closed.

Launch Control

E234583

Illuminates when this feature is
ready, including both slip control
and engine RPM hold.

E255688

Illuminates when only engine
RPM hold is active. See Using
Stability Control (page 155).

Low Beam Malfunction

E181350

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.

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

E132353

It illuminates when the washer
fluid is low.

Oil Pressure Warning Lamp

It 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 229).

Parking Lamps

It will illuminate when you switch
the parking lamps on.

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 141).