Adaptive Cruise Control Warning Light
Adaptive Cruise Control (ACC) is unavailable or has detected a radar, camera, brake, calibration, or communication fault.
Drive manually and maintain a safe following distance. Have ACC diagnosed if the warning persists.
Adaptive Cruise Control uses radar, cameras, or both to maintain a selected speed and following distance. The system can disable itself when sensors are blocked or when a related vehicle-system fault is detected.
⚠️ Drive With Caution
Drive manually because adaptive cruise control may not function. The driver must maintain speed and following distance.
$100-$2,500+ depending on sensor, wiring, module, 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.
ACC faults generally disable adaptive cruise functionality while normal manual driving remains possible. Do not rely on ACC until the system is restored and verified.
Why is adaptive cruise control unavailable?
Most commonly the forward radar or camera cannot see well enough, from rain, spray, snow, or dirt. ACC also shuts down if the ABS, stability, or brake system reports its own fault, since it needs those systems to slow the car.
Does normal cruise control still work?
On many vehicles, yes: fixed-speed cruise remains available while the distance-keeping function is disabled. On others the whole cruise system goes offline together.
How is an adaptive cruise fault diagnosed?
The ADAS module is scanned, then the forward radar and the windscreen camera area are inspected for obstruction or damage. Brake and stability communication is checked, since a fault there will disable ACC on its own, and sensor alignment, calibration, and any bumper damage are assessed before parts are considered.
How much does adaptive cruise repair cost?
Cleaning a sensor is free. Calibration typically runs $250-$600, and a replacement radar or ADAS module with calibration can reach $2,500.
See every fault code, sensor test, and repair step for ADAS-ACC