Ford Mustang Owners Manual: Warning lamps and indicators
These indicators can alert you to a vehicle condition that may become serious enough to cause expensive repairs. Many lights will illuminate when you start your vehicle to make sure they work. If any light remains on after starting the vehicle, refer to the respective system warning light for additional information.
If this light fails to illuminate when the ignition is turned on, continues to flash or remains on, contact your authorized dealer as soon as possible. A chime will sound when there is a malfunction in the indicator light.
Anti-lock Brake System
If the ABS light stays illuminated or continues to flash, a malfunction has been detected. Contact your authorized dealer as soon as possible. Normal braking is still functional unless the brake warning light also is illuminated.
Flashes when the SecuriLock® passive anti-theft system has been activated.
Brake System Warning Light
To confirm the brake system warning light is functional, it will momentarily illuminate when the ignition is turned to the on position when the engine is not running, or in a position between on and start, or by applying the parking brake when the ignition is turned to the on position.
If it illuminates when you are driving, check that the parking brake is not engaged. If the parking brake is not engaged, this indicates low brake fluid level or a brake system malfunction. Have the system checked immediately by your authorized dealer.
: Driving a vehicle with the brake system warning light on is dangerous. A significant decrease in braking performance may occur. It will take you longer to stop the vehicle.
Have the vehicle checked by your authorized dealer as soon as possible.
Driving extended distances with the parking brake engaged can cause brake failure and the risk of personal injury.
Illuminates when the battery is not charging properly. If it stays on while the engine is running, there may be a malfunction with the charging system. Contact your authorized dealer as soon as possible. This indicates a problem with the electrical system or a related component.
Illuminates when the ignition is on and any door is not completely closed.
Engine Oil Pressure
Illuminates when the oil pressure falls below the normal range.
Engine Coolant Temperature
Illuminates when the engine coolant temperature is high. Stop the vehicle as soon as possible, switch off the engine and let it cool.
Illuminates when the high beam headlamps are on.
Illuminates when the fuel level in the fuel tank is at or near empty.
Low Tire Pressure Warning
Illuminates when your tire pressure is low. If the light remains on at start-up or while driving, the tire pressure should be checked. When the ignition is first turned to on, the light will illuminate for three seconds to ensure the bulb is working. If the light does not turn on or begins to flash, contact your authorized dealer as soon as possible.
Powertrain Malfunction/Reduced Power
Illuminates when a powertrain fault has been detected. Contact your authorized dealer as soon as possible.
Reminds you to fasten your safety belt. A Belt-Minder® chime will also sound to remind you to fasten your safety belt.
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.
: 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.
Stability Control System Off
Illuminates when AdvanceTrac®/Traction control has been disabled by the driver.
Illuminates when the left or right turn signal or the hazard warning flasher is turned on. If the indicators stay on or flash faster, check for a burned out bulb.
Upshift (if equipped)
To maximize fuel economy, this light illuminates when the manual transmission should be shifted to the next highest gear.
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Shift Point Road Test
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