Ford Fusion Warning Lights: What They Mean

Other warnings and indicators

Engine Coolant Temperature

Engine coolant temperature is high.
What to do: Stop as soon as possible, switch off the engine and let it cool. PDF page 94

Engine Oil

Lit while the engine runs or while driving, it indicates a malfunction.
What to do: Stop safely, switch engine off, check oil level. If it stays lit despite correct level, do not drive on; see dealer immediately. PDF page 94

Front Airbag

Malfunction if it fails to light at start, keeps flashing or stays on.
What to do: Have the system checked by your authorized dealer. PDF page 94

Electric Park Brake

The electric parking brake has a malfunction. PDF page 94

Stability and Traction Control Light

Flashes when either system is active; steady light means a problem in either system.
What to do: Make sure you did not switch traction control off; if still steady, have an authorized dealer service it immediately. PDF page 180

Service Engine Soon Indicator

The OBD-II system has detected an emission-related malfunction, which may be temporary, such as from a loose fuel inlet or poor fuel.
What to do: If it stays on after three driving cycles, have the vehicle serviced at the first available opportunity. PDF page 164

Seatbelt Warning Lamp

Driver seatbelt is not fastened when the ignition is turned on; a chime sounds with it.
What to do: Buckle the driver seatbelt to turn the lamp and chime off. PDF page 39

Passenger Airbag Status Indicator

Shows whether the front passenger frontal airbag is ON (enabled) or OFF (disabled).
What to do: If OFF with an adult seated, have them sit upright for about two minutes; otherwise ride in rear. Reinstall child seat if ON. PDF page 47

Direction Indicator

Lights when a turn signal or hazard flasher is on; staying on or flashing fast suggests a burned out bulb.
What to do: Check for a burned out bulb. PDF page 94

Door Ajar

Ignition is on and a door is not completely closed. PDF page 94

Stability and Traction Control Off Light

Lights briefly at engine start and stays on when traction control is switched off. PDF page 180

Cruise Control

Lights when the feature is switched on. PDF page 94

Front Fog Lamps

Lights when the front fog lamps are switched on. PDF page 94

Grade Assist

Lights when the grade assist function is switched on. PDF page 94

Summarized in our own words from the 2020 Ford Fusion owner's manual (AI-assisted; every light name was matched against its cited page 2026-10-18). Your vehicle may not have every light, and other years can differ. A red warning that stays on usually means stop safely and check: your manual has the final word.