FORD 2015 Mustang - Manual (Page 84)

It will also illuminate 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.
Parking Lamps
It will illuminate when you switch
the parking lamps on.
Service Engine Soon
If the service engine soon
indicator light stays illuminated
after the engine is started, it
indicates that the On Board Diagnostics
system (OBD) has detected a malfunction
of the vehicle emissions control system.
Refer to On board diagnostics (OBD) in
the Fuel and Refueling chapter for more
information about having your vehicle
serviced. See Emission Control System
(page 131).
If the light is blinking, engine misfire is
occurring which could damage your
catalytic converter. Drive in a moderate
fashion (avoid heavy acceleration and
deceleration) and have your vehicle
serviced immediately.
Note: Under engine misfire conditions,
excessive exhaust temperatures could
damage the catalytic converter or other
vehicle components.
The service engine soon indicator light
illuminates when the ignition is first turned
on prior to engine start to check the bulb
and to indicate whether the vehicle is ready
for Inspection/Maintenance (I/M) testing.
Normally, the service engine soon light will
stay on until the engine is cranked, then
turn itself off if no malfunctions are
present. However, if after 15 seconds the
service engine soon light blinks eight times,
it means that the vehicle is not ready for
I/M testing. See Emission Control
System (page 131).
Stability Control
E138639
It will flash when the system is
active. If it remains illuminated
or does not illuminate when you
switch the ignition on, this indicates a
malfunction. During a malfunction the
system will switch off. Have the system
checked by your authorized dealer
immediately. See Using Stability
Control (page 144).
Stability Control Off
It will illuminate when you switch
the system off. It will go out
when you switch the system
back on or when you switch the ignition
off. See Using Stability Control (page
144).
AUDIBLE WARNINGS AND
INDICATORS
Keyless Warning Alert
The horn will sound twice when you exit
your vehicle with the intelligent access key
and your 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.
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Mustang (), enUSA, First Printing
Instrument Cluster