Warning lamps and indicators
The following warning lamps and indicators will come on briefly when you switch the ignition on to confirm that the system is operational:
• ABS. • Airbag. • Brake system. • Doors open. • Engine. • Engine immobiliser. • Engine systems fault. • Frost. • Ignition. • Oil pressure. • Power steering.• Stability control (ESP).
If a warning or indicator lamp does not illuminate when the ignition is switched on, this indicates a malfunction. Have the system checked by properly trained technician.

If it illuminates when you are driving, this indicates a malfunction. You will continue to have normal braking (without ABS).
Have the system checked by a properly trained technician as soon as possible.

If it illuminates when you are driving, this indicates a malfunction. Have the system checked by a properly trained technician.

It illuminates when the parking brake is engaged.
Reduce your speed gradually and stop your vehicle as soon as it is safe to do so. Use your brakes with care.If it illuminates when you are driving, check that the parking brake is not engaged. If the parking brake is not engaged, this indicates a malfunction. Have the system checked by a properly trained technician immediately.

It will illuminate when you have set a speed using the cruise control system. See Using cruise control.

Flashes during operation. A sudden increase in the rate of flashing warns of a failed indicator bulb. See Changing a bulb.

Illuminates when the ignition is switched on and remains on if any door, the bonnet or the luggage compartment is not closed properly.

If it illuminates when the engine is running, this indicates a malfunction. If it flashes when you are driving, reduce the speed of your vehicle immediately. If it continues to flash, avoid heavy acceleration or deceleration. The engine will continue to run but it will have limited power. Have this checked immediately.
If the engine warning lamp illuminates in conjunction with a message, have the system checked as soon as possible.
It will illuminate when you switch the front fog lamps on.

It will illuminate and glow orange when the outside air temperature is between 4ºC (39ºF) and 1ºC (34ºF). It will glow red when the temperature is below 1ºC (34ºF).

See Starting a diesel engine.

It will illuminate when you switch the headlamp dipped beam or the side and tail lamps on.

If it illuminates when you are driving, this indicates a malfunction. Switch off all unnecessary electrical equipment. Have the system checked by a properly trained technician immediately.

If it illuminates, refuel as soon as possible.

It will illuminate when you switch the headlamp main beam on. It will flash when you use the headlamp flasher.

It will illuminate when a new message is stored in the information display. See Information messages.

If it stays on after starting or illuminates when driving, this indicates a malfunction. Stop your vehicle as soon as it is safe to do so and switch the engine off. Check the engine oil level. See Engine oil check.

It illuminates to indicate a malfunction of the power steering system. Full steering will be maintained but you will need to exert greater force on the steering wheel.
Have the system checked by a properly trained technician as soon as possible.

It will illuminate when you switch the rear fog lamps on.

See Seat belt reminder.

It will illuminate to inform you that shifting to a higher gear may give better fuel economy and lower CO2 emissions. It will not illuminate during periods of high acceleration, braking or when the clutch pedal is pressed.

While driving, it flashes during activation of the system. After switching on the ignition, if it does not illuminate or illuminates continuously while driving, this indicates a malfunction. During a malfunction, the system switches off. Have the system checked by a properly trained technician as soon as possible.
If you switch ESP off, the warning lamp will illuminate. The lamp will go out when you switch the system back on or when you switch the ignition off.
Test yourself
A quick Ford Focus quiz: every answer comes with an explanation and a link to the manual page.