What it means
General fault on the radar/lidar/camera distance-range sensor used by adaptive cruise control. On systems with a single sensor or three sensors with a center unit, this code refers to the central sensor — without it, ACC distance control is disabled and the system falls back to plain cruise.
At a glance
- Usually lights the check-engine light
How it works
Adaptive cruise control uses a forward-facing radar, camera, lidar, or a combination of sensors to estimate the distance to traffic ahead. The control module monitors the single distance sensor or the center sensor in a multi-sensor setup, and sets this code when it detects a fault with that sensor. Distance keeping may be disabled while ordinary cruise control remains available.
Common causes
Most likely first.
- Dirty sensor surface (radar emblem / camera lens)
- Sensor misaligned after a frontal impact
- Failed sensor module
Symptoms
- Adaptive cruise control unavailable or disabled
- Cruise control may operate without distance keeping
- Check-engine or driver-assistance warning light may come on
How to diagnose it
- Check the freeze-frame and driver-assistance status data to see when the center distance sensor fault was recorded and whether adaptive cruise was disabled.
- Clean the radar cover or camera lens and check for mud, ice, stickers, or damage that could obstruct the sensor.
- Inspect the center sensor and its mount for looseness, impact damage, or misalignment, especially after a front-end repair or collision.
- Check the sensor connector and wiring for corrosion, damage, or a loose connection.
- Use the vehicle's diagnostic data and manufacturer procedure to verify sensor operation and alignment before replacing the sensor.
Common fixes
- Clean the sensor cover or camera lens.
- Repair a loose or damaged sensor mount and restore its alignment.
- Repair damaged wiring or connector contacts.
- Replace a failed center distance sensor and calibrate it as specified by the manufacturer.
Can I keep driving?
You can use ordinary cruise control only if the vehicle confirms that it is operating without adaptive distance control; leave extra space and be ready to brake yourself. Do not rely on the car to slow for traffic, and have the sensor checked if its warning persists.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.