Ford Mustang Dashboard Warning Lights

Detailed on this page are the dashboard warning lights for the Ford Mustang. Green and blue symbols are information warning indicators to alert the driver that a particular system is running. Many of the warning lights that come on with the ignition and go off just after engine start are bulb checks.

If a warning light stays on after starting your Mustang, it may indicate a problem. Amber / yellow warning lights typically indicate a non-urgent issue, but means you can normally continue driving. Red warning lights may indicate a serious fault that may require you to stop driving. The Ford Mustang dashboard warning lights are as follows:

Airbag Warning Light
The Ford Mustang airbag warning light comes on in red. It should illuminate when the ignition is switched on as a bulb check. If the warning light stays on or flashes after engine start, it indicates a fault.
Common Airbag Warning Light Reasons
Reasons for the Ford Mustang airbag warning light coming on can include:

• Faulty seat occupancy sensor
• Object lodged in seat belt buckle
• Cables or connectors dislodged under the front seats
• Airbag sensor fault

ABS Warning Light
ABS stands for ‘Anti-lock Braking System’ and works as an additional safety precaution alongside your vehicle’s brakes to help the driver maintain control of the vehicle by preventing wheel locking under heavy braking. The Ford Mustang ABS warning light remains on after engine start indicating a fault with the system. Normal brakes will continue to operate.
Common ABS Warning Light Reasons
Reasons for the Ford Mustang ABS warning light coming on can include:

• ABS wheel speed sensor malfunction
• ABS fuse blown
• Low brake fluid
• Faulty ABS module
• Failing hydraulic pump

Automatic Headlights Symbol
The headlights symbol containing the letter ‘A’ means the Ford Mustang automatic headlights are activated. When activated, sensors detect low light and automatically turn on the headlights. Automatic headlights can be activated via your light switch, by turning it to the symbol of a light bulb containing the letter ‘A’. When activated, it’s normal for the headlamps to stay on for a short period when switching off the engine. This can be adjusted in the vehicle setting menu along with the time delay.

Battery Warning Light
The Ford Mustang battery warning light comes on as a bulb check with the ignition but should go out shortly after engine start. If the warning light comes on while driving, it means there’s an electrical fault and battery charge is being lost. When battery charge is depleted, the engine will shut down. Immediately switch off any unnecessary electrical equipment and make your way immediately to a vehicle repair workshop.
Common Battery Warning Light Reasons
Reasons for the Ford Mustang battery warning light coming on can include:

• Failing alternator
• Loose / corroded cables and connectors
• Bad earth
• Old failing battery
• Alternator belt damaged or loose

Blind Spot Warning Light
The Ford Mustang blind spot monitoring system is designed to detect vehicles that may have entered the blind spot zone that you cannot see in your mirrors. When the system detects a vehicle in the blind spot, a warning light appears in the corresponding external mirror. If there is a fault with the system, a warning light displays on the dashboard instrument cluster. The usual cause is a blocked or damaged sensor. The sensors are behind the rear bumper on both sides of your vehicle. Ensure the areas are kept clean.

Brake Warning Light
The Ford Mustang brake warning light comes on when the handbrake or parking brake is applied. If the parking brake is properly released and the warning light is still on, it may be dangerous to continue driving your vehicle.
Common Brake Warning Light Reasons
Reasons for the Ford Mustang brake warning light coming on can include:

• Low brake fluid
• Fault with the brake system

Engine Coolant Warning Light
The Ford Mustang engine coolant warning light comes on in red indicating that the engine is overheating. If the warning light comes on while driving, pull off the road safely and switch off the engine. Wait until the engine has cooled and check coolant levels. If levels are within acceptable range, do not continue driving as engine damage may occur. If you have topped up with coolant, only continue driving if the warning light goes off.
Common Engine Coolant Warning Light Reasons
Reasons for the Ford Mustang engine coolant warning light coming on can include:

• Low coolant level
• Faulty thermostat / sensors
• Water leak
• Water pump

Lane Keeping Warning Light
This symbol illuminates when the Ford Mustang lane keeping system is activated. The system alerts the driver when they are driving outside of their road lane if a indicator signal has not been applied. If a warning light or message is displayed for lane keeping, ensure the camera has a clear view located at the top center of the windshield. Depending on your vehicle, the system may also use a radar located in the front grille.

 

Low Beam Fault Warning Light
This warning light illuminates when there’s a fault with the Ford Mustang low beam headlight bulb.

 

 

Tire Pressure Warning Light
The Ford Mustang tire pressure warning light comes on when low pressure has been detected in one or more tires. The tire pressure light flashes for approx. one minute, then stays on if there’s a problem with the tire pressure monitoring system. The Ford Mustang uses a ‘direct’ tire pressure monitoring system (TPMS) meaning that there are sensors located in each wheel.
Common Tire Pressure Warning Light Reasons
Reasons for the Ford Mustang tire pressure warning light coming on can include:

• Sensors are faulty
• Sensor battery exhausted
• Tires with varying width fitted to vehicle
• Sensors not fitted to tires
• Spare tire fitted
• Tire pressure low
• Outside temperature low

Oil Pressure Warning Light
The Ford Mustang oil pressure warning light may indicate a malfunction in the engine lubrication system and requires immediate action. If driving, pull over and switch off the engine. Low oil level may cause the oil pressure light to illuminate. Check oil levels. If oil levels are adequate, do not continue driving as significant engine damage will occur. If the low oil pressure warning light has gone out after adding oil, you can continue driving.

 

Powertrain Warning Light
The Ford Mustang wrench warning light indicates a fault with the powertrain. The powertain is a vast collection of components ranging from the engine, transmission and driveshaft. There are many potential faults associated with this warning light. If the Ford Mustang powertrain warning light comes on, you will need diagnostic equipment hooked up to read fault codes.

 

Engine Malfunction Warning Light
This light is the service engine soon warning light, also known as the check engine warning light or the engine malfunction warning light. It illuminates when The Ford Mustang on-board diagnostics system has detected a malfunction with the emissions control system. If the light stays on steady, it’s usually safe to continue driving. If the light flashes, it may indicate an engine misfire. In this case, damage to the catalytic converter may occur. Avoid heavy acceleration and have the engine serviced by a Ford workshop as soon as possible.

When the engine malfunction warning light illuminates, fault codes are often stored. These codes can be read with diagnostic tools.
Common Engine Malfunction Warning Light Reasons
There are many potential faults associated with the check engine light. Common reasons for the Ford Mustang engine malfunction warning light coming on can include:

• The gas cap is loose or missing
• Bad oxygen sensor
• Spark plugs issue
• Catalytic converter issue
• Mass airflow sensor fault

Stability Control Warning Light
The Electronic Stability Control (ESC) system provides many vehicle stability function that help to reduce understeer and oversteer and to improve traction. The system can be switched off but should be left on except under certain conditions such as being stuck in snow, or for some drivers who take their Mustang track racing. The Ford Mustang Electronic Stability Control warning light will flash to indicate that the system is operating. The light remains on if there’s a fault with the system.
Common ESC Warning Light Reasons
Common reasons for the Ford Mustang Electronic Stability Control warning light coming on can include:

• ABS wheels speed sensor faults
• Steering angle sensor fault
• Traction control module fault