tail/brake light bulb failure (if fitted)
To check that the warning light is working, the symbol is illuminated for a short time when the ignition is first turned ON.
If the symbol is illuminated while the park/head lights are on, then a bulb failure of tail lights is indicated.
If the symbol is displayed while depressing the brake pedal, then a bulb failure of the brake light is indicated.
If the symbol flashes for 15 seconds, then a fuse failure (of either the brakes or the park/head lights) is indicated.