Short answer
The forward collision warning light means the automatic emergency braking or collision warning system is switched off or cannot work right now, often because the radar or camera is blocked. The car drives normally, but nothing will warn you or brake for you, so leave more following distance until it is back.
- Also shown as:
- AEB light · FCW light · Pre-collision system light · “Front radar blocked” message
- What it looks like:
- Two cars nose to tail with a star or wavy lines between them, sometimes with the word OFF.
Is it safe to keep driving?
Yes — you are driving a car without the assist, so leave more following distance.
What causes the forward collision / emergency braking light?
Most common first. Symbols and meanings vary by manufacturer; your owner's manual has the definitive meaning for your model.
- Blocked radar or camera. Ice, snow, mud or bugs on the grille badge or bumper radar, or grime on the windshield camera area, blind the system.
- System switched off. Some cars let you switch it off in a settings menu, and some switch it back on at every start.
- Sensor fault or misalignment. A minor front-end knock or bumper repair can knock the radar out of alignment, so it no longer trusts its readings.
What should you do right now?
- Clean the front grille badge and the camera area of the windshield.
- If it persists, have the sensor checked, and check your VIN for recalls and owner complaints on your model.
What does the fix usually involve?
A shop reads the codes, checks for damage behind the bumper, and aligns the radar or calibrates the camera to the manufacturer's procedure. Replacement is for a damaged sensor.
How much does it cost to fix?
$0 – $900
Free if cleaning the sensor fixes it; sensor realignment or replacement at the high end.
A typical range, not a quote. Actual cost depends on the car, the shop and the fault.
Common questions
Why does my car say the front radar is blocked?
Usually snow, ice, mud or bugs on the sensor behind the front badge or lower grille. Clean it gently; if the message persists on a clean car, have the sensor checked.
Does a minor fender-bender affect emergency braking?
It can. Even a small knock can shift the radar's aim. After any front-end repair, ask for the sensor to be checked and recalibrated if needed.
Check your car
Free VIN check: open NHTSA recalls, owner complaints and the safety rating for your exact car.