حساس الرادار غير محاذٍ

A radar sensor aimed a few degrees away from where the module believes it points. Aim is part of the calibration, not a detail: the module knows what the sensor should see when the car travels straight, and a geometry that no longer matches produces readings it rejects from hardware that is working perfectly.

Bumper work is the usual trigger — these sensors mount behind plastic skins, and a bumper refitted a few millimetres out, a bracket bent in a car-park knock, or accident repair at either end is enough. Replacing the sensor without re-aiming it reproduces the fault with a new part.

The repair is a calibration procedure, usually requiring targets at measured distances on level ground, and it is the step most often skipped.