Auto Emergency Brake Warning Light
The Automatic Emergency Braking (AEB) system is unavailable, malfunctioning, or has detected conditions that may prevent automatic braking assistance.
Drive carefully, increase following distance, and do not rely on AEB until the system is restored. Have the fault diagnosed promptly.
Automatic Emergency Braking can apply the brakes when the system detects an imminent collision and the driver does not respond sufficiently. Availability depends on vehicle speed, road conditions, sensor visibility, and manufacturer design.
⚠️ Drive With Caution
The vehicle may remain drivable, but automatic emergency braking may not operate correctly. Maintain a greater following distance and drive manually.
$100-$2,500+ depending on sensor, module, wiring, or calibration
Repair costs vary depending on the exact diagnostic trouble code, vehicle make and model, labor rates, and which component has failed. Always diagnose the problem before replacing any parts.
An AEB fault can disable an important collision-avoidance feature. Do not assume the system will intervene; restore and verify it before relying on automatic braking assistance.
What does an AEB unavailable message mean?
The car will no longer brake for you automatically. It is usually a blocked or misaligned forward sensor rather than a brake fault, but the outcome is the same: the feature is switched off.
Can I drive without AEB?
Yes. Your ordinary brakes are unaffected. Just increase your following distance, since the system that would have caught a late-braking moment is not watching.
How is an AEB fault diagnosed?
The ADAS module is scanned, then the radar and camera sensing areas are inspected for obstruction or impact damage. Network communication is verified, sensor alignment and calibration status are checked, and any related brake-system codes are reviewed, since AEB will also disable itself when the brake or stability side reports a fault.
How much does AEB repair cost?
Cleaning a sensor costs nothing. Calibration is typically $250-$600, and a replacement forward radar or camera with calibration can reach $2,500.
See every fault code, sensor test, and repair step for ADAS-AEB