Ride Height Sensor
An electronic sensor mounted to the suspension linkage that measures the vertical distance between the chassis and the axle.
A ride height sensor is an electronic monitoring device used in vehicles equipped with self-leveling air suspension, active damping, or automatic leveling headlights. Typically mounted on the frame with a small linkage arm connected to a suspension control arm, the sensor measures the angle of the suspension to determine the distance between the vehicle body and the axle.
As the suspension moves up and down, the sensor sends a variable voltage signal to the suspension control module. The module uses this data to adjust air pressure in the air springs or adjust shock absorber stiffness to maintain a level ride.
If a ride height sensor fails, is damaged by road debris, or if its linkage breaks, the control module will receive inaccurate readings. This can cause the suspension to sag on one side, ride extremely rough, or trigger an air suspension warning light on the dashboard.