2015 Ford Mustang Owner Manual Printing 1 - Page 84

Instrument Cluster 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. 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). Parking Lamps It will illuminate when you switch the parking lamps on. Stability Control It will flash when the system is active. If it remains illuminated E138639 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). 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. 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. 81 Mustang (), enUSA, First Printing