2001 FORD MUSTANG check engine light

WARNING LIGHTS AND CHIMES
Base instrument cluster
Optional instrument cluster
Turn signal
Illuminates when the
left or right turn signal
or the hazard lights are
turned on. If one or
both of the indicators stay on continuously or flash
faster, check for a burned-out turn signal bulb. Refer
toBulbsin theMaintenance and carechapter.
High beams
Illuminates when the
high beam headlamps
are turned on.
P! BRAKE
L
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H
THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
.
CHECK
FUEL
CAP
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LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOONCHECK
FUEL
CAP
MPH km/h
ABS
.
Instrumentation
8

TheService Engine Soonindicator light illuminates
when the ignition is first turned to the ON position
to check the bulb. If it comes on after the engine is
started, one of the engine's emission control systems
may be malfunctioning. The light may illuminate
without a driveability concern being noted. The
vehicle will usually be drivable and will not require
towing.
What you should do if the Service Engine Soon
light illuminates
Light turns on solid:
This means that the OBD II system has detected a
malfunction.
Temporary malfunctions may cause yourService
Engine Soonlight to illuminate. Examples are:
1. The vehicle has run out of fuel. (The engine may
misfire or run poorly.)
2. Poor fuel quality or water in the fuel.
3. The fuel cap may not have been properly installed
and securely tightened.
These temporary malfunctions can be corrected by
filling the fuel tank with high quality fuel of the
recommended octane and/or properly installing and
securely tightening the gas cap. After three driving
cycles without these or any other temporary
malfunctions present, theService Engine Soonlight
should turn off. (A driving cycle consists of a cold
engine startup followed by mixed city/highway
driving.) No additional vehicle service is required.
If theService Engine Soonlight remains on, have
your vehicle serviced at the first available opportunity.
Light is blinking:
Engine misfire is occurring which could damage your
catalytic converter. You should drive in a moderate
fashion (avoid heavy acceleration and deceleration)
and have your vehicle serviced at the first available
opportunity.
Instrumentation
10

Under engine misfire conditions, excessive
exhaust temperatures could damage the
catalytic converter, the fuel system, interior floor
coverings or other vehicle components, possibly
causing a fire.
Check fuel cap (if equipped)
Momentarily
illuminates when the
ignition is turned to
the ON position to
ensure your bulb is working. When this light turns
on, check the fuel filler cap. Continuing to operate
the vehicle with the check fuel cap light on, can
activate theService Engine Soon/Check Engine
warning light. When the fuel filler cap is properly
re-installed, the light(s) will turn off after a period of
normal driving. This period will vary depending on
driving conditions.
It may take a long period of time for the
system to detect an improperly installed fuel
filler cap.
For more information, refer toFuel filler capin the
Maintenance and carechapter.
Low fuel
Illuminates as an early
reminder of a low fuel
condition indicated on
the fuel gauge (refer to
Fuel Gaugein this chapter for more information).
When refueling, after the light comes on, the amount
of fuel that is added will be less than the advertised
capacity since there is fuel still in the tank. The
ignition must be in the ON position for this lamp to
illuminate. The lamp will also illuminate for several
seconds after the ignition is turned to the ON
position regardless of the fuel level to ensure your
bulb is working.
CHECK
FUEL
CAP
LOW
FUEL
Instrumentation
11

O/D off (if equipped)
Illuminates when the
Transmission Control
Switch (TCS), refer to
Overdrive controlin
theControls and Featureschapter, has been
pushed turning the transmission overdrive function
OFF. When the light is on, the transmission does not
operate in the overdrive mode, refer to theDriving
chapter for transmission function and operation.
The light may also flash steadily if a transmission
malfunction is detected. If the light does not come
on when the Transmission Control Switch is
depressed or if the light flashes steadily, have your
vehicle serviced as soon as possible, damage to the
transmission could occur.
Traction ControlYactive
For more information,
refer to theDriver
controlschapter.
Momentarily illuminates when the ignition is turned
to ON. It also illuminates when the Traction
Controlysystem begins applying and releasing the
brakes and adjusting the engine characteristics to
limit a wheelspin condition. It will be lit for a
minimum of four seconds or for the duration of the
Traction Controlyevent.
For more information, refer to theDrivingchapter.
Anti-lock brake system (ABS)
Momentarily illuminates
when the ignition is
turned to the ON
position to indicate a
system check. If the light remains on, continues to
flash or fails to illuminate, have the system serviced
immediately. With the ABS light on, the anti-lock
brake system is disabled and normal braking is still
effective unless the brake warning light also remains
illuminated with the parking brake released.
O/D
OFF
ABS
Instrumentation
12

GAUGES
Base instrument cluster gauges
Optional instrument cluster gauges
Fuel gauge
Displays approximately
how much fuel is in the
fuel tank (when the
key is in the ON
position). The fuel gauge may vary slightly when the
vehicle is in motion or after refueling. The ignition
should be in the OFF position while the vehicle is
being refueled. When the gauge first indicates
empty, there is a small amount of reserve fuel in the
tank. When refueling the vehicle from an empty
indication, the amount of fuel that can be added will
be less than the advertised capacity due to the
reserve fuel.
P! BRAKE
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THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
00000 00.
CHECK
FUEL
CAP
P! BRAKE
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00000 00
FH
H
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RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
.
L
LCHECK
FUEL
CAP
F
Instrumentation
14

3. Turn the key to 4
(ON) without turning
the key to 5 (START).
If there is difficulty in
turning the key, firmly
rotate the steering
wheel left and right
until the key turns
freely. This condition may occur when:
²front wheels are turned
²front wheel is against the curb
²steering wheel is turned when getting in or out of
the vehicle
Make sure the corresponding lights illuminate or
illuminate briefly. If a light fails to illuminate, have
the vehicle serviced.
²If the driver's safety belt is fastened, the
light
may not illuminate.
1
2
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5
P! BRAKE
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FH
LH
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120
140
160
180
405060 70
80
90
100
11 0
1204
5
6
7 3
2
1
H
THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
.
CHECK
FUEL
CAP
P! BRAKE
L
0
00000 00
C
E
FH
LH
102040608020 40608010 012 0 14 0
160
180
200
220
240
100
120
140
305070 90
110
13 0
1504
5
6
7
8 3
2
1
H
THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
.
CHECK
FUEL
CAP
Starting
105

BRAKES
Your service brakes are self-adjusting. Refer to the
scheduled maintenance guide for scheduled
maintenance.
Occasional brake noise is normal and often does not
indicate a performance concern with the vehicle's
brake system. In normal operation, automotive brake
systems may emit occasional or intermittent squeal
or groan noises when the brakes are applied. Such
noises are usually heard during the first few brake
applications in the morning; however, they may be
heard at any time while braking and can be
aggravated by environmental conditions such as
cold, heat, moisture, road dust, salt or mud. If a
ªmetal-to-metal,º ªcontinuous grindingº or
ªcontinuous squealº sound is present while braking,
the brake linings may be worn-out and should be
inspected by a qualified service technician.
Anti-lock brake system (ABS)
On vehicles equipped with an anti-lock braking
system (ABS), a noise from the hydraulic pump
motor and pulsation in the pedal may be observed
during ABS braking events. Pedal pulsation coupled
with noise while braking under panic conditions or
on loose gravel, bumps, wet or snowy roads is
normal and indicates proper functioning of the
vehicle's anti-lock brake system. The ABS performs a
self-check after you start the engine and begin to
drive away. A brief mechanical noise may be heard
during this test. This is normal. If a malfunction is
found, the ABS warning light will come on. If the
vehicle has continuous vibration or shudder in the
steering wheel while braking, the vehicle should be
inspected by a qualified service technician.
Driving
108

After a collision, if the engine cranks but does not
start, the fuel pump shut-off switch may have been
activated.
The fuel pump shut-off
switch is located on
the left side of the
trunk behind teh left
rear tail light and the
trunk liner.
Use the following procedure to reset the fuel pump
shut-off switch.
1. Turn the ignition to the OFF position.
2. Check the fuel system for leaks.
3. If no fuel leak is apparent, reset the fuel pump
shut-off switch by pushing in on the reset button.
4. Turn the ignition to the ON position. Pause for a
few seconds and return the key to the OFF position.
5. Make a further check for leaks in the fuel system.
FUSES AND RELAYS
Fuses
If electrical
components in the
vehicle are not
working, a fuse may
have blown. Blown
fuses are identified by a broken wire within the fuse.
15
Roadside emergencies
131