anti-theft light · security system light · key symbol light
Usually a blinking light with a car and lock or key icon, showing the anti-theft immobilizer system is armed, or flagging that it does not recognize the key trying to start the car.
If the car will not start and this light is on solid or flashing rapidly, try a spare key. If the issue persists, the key fob battery or transponder chip may need replacing, or the immobilizer module may need diagnosis.
The slow blink while parked is completely normal. If the car starts and drives fine, there is no issue; if the car will not start at all, it will need diagnosis before it can be driven.
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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.
This warning light sometimes appears alongside these symptoms:
Seatbelt Reminder Light
InfoThe system has detected that the driver or a passenger is not wearing a seatbelt, usually combined with a chime.
Traction Control / Electronic Stability Control Light
InfoThis light (usually a car icon with wavy skid lines) flashes briefly when the traction or stability control system is actively working to keep the car stable, for example on a slippery surface.
ESC Off / Traction Control Off Light
InfoThe driver has manually turned off the electronic stability control or traction control system, usually with a dedicated dashboard button.
Glow Plug Warning Light (Diesel)
InfoOn diesel engines, this coil-shaped light shows the glow plugs are preheating the combustion chambers before starting - completely normal. It becomes a fault indicator only if it flashes or stays on after the engine is running.