Amber light
Collision Warning / Emergency Braking
The forward collision warning or automatic emergency braking system is warning of an obstacle, or the system is switched off or faulty.
High risk
If it warns while driving, brake. If it shows a fault or OFF, the system may not help in an emergency; drive with extra care.
Short answer · Why is the collision warning light on?
If it flashes with a sound, the system thinks a collision is possible: brake. If it stays on, the system may be off, blocked by dirt, snow or ice on the sensor, or faulty. Clean the sensor area and have it checked if the light remains.
What to do
- React to warningsIf the light flashes with a sound, brake and increase your distance.
- Clean the sensorsClean the radar area in the front and the windscreen in front of the camera.
- Check settingsMake sure the system has not been switched off in the menu.
- Have it calibrated if neededAfter windscreen replacement or a front knock, the sensors may need calibration.
How is the light behaving?
| What you see | What it usually means | What to do |
|---|---|---|
| Flashing | Possible collision ahead | Brake and increase your distance |
| Steady | System off, blocked or faulty | Clean sensors and have it checked |
| On for a few seconds at start-up | Normal check at start-up | Nothing |
Possible causes
- Dirt, snow or ice on the sensorThe radar or camera cannot see.
- System switched offIt can be switched off in the menu.
- Sensor misalignedAfter a front impact or windscreen change.
- Sensor or control unit faultRequires a workshop check.
Don't confuse it with
Questions about Collision Warning / Emergency Braking
Can the system brake by itself?
Yes, automatic emergency braking can brake hard if you do not react.
Why does it warn when there is nothing ahead?
Bridges, shadows or a dirty sensor can cause false warnings.