2013 Ford Mustang Owner Manual Printing 3 - Page 96

Instrument Cluster 95 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. 2013 05+ Mustang (197) Owners Guide gf, 3rd Printing USA (fus)