FORD 2014 Mustang v.1 - Manual (Page 98)

Service Engine Soon
The service engine soon indicator light illuminates when the
ignition is first turned to the on position 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 the
Readiness for Inspection/Maintenance (I/M) testing in the Fuel and
Refueling chapter.
Solid illumination after the engine is started indicates the on-board
diagnostics system (OBD-II) has detected a malfunction. See On-board
Diagnostics (OBD-II) in the Fuel and Refueling chapter. 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 by your
authorized dealer.
WARNING: 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.
Speed Control (if equipped)
The speed control system indicator light changes color to
indicate what mode the system is in:
• On (amber light): Illuminates when the speed control system is turned
on. Turns off when the speed control system is turned off.
• Engaged (green light): Illuminates when the speed control system is
engaged. Turns off when the speed control system is disengaged.
Stability Control System
Illuminates when the AdvanceTrac®/Traction control is active.
If the light remains on, have the system serviced immediately.
Instrument Cluster 97
2014 05+ Mustang (197)
Owners Guide gf, 1st Printing, November 2012
USA (fus)