What it means
A fault was detected in the cruise-control front distance-range sensor on the left. The code does not specify the sensor technology or how the vehicle responds.
At a glance
- Usually lights the check-engine light
How it works
The left front distance-range sensor supplies information used by adaptive cruise control or forward-distance warning. The control module monitors the left sensor for usable data and sets this code when it detects a fault; the code alone does not identify the sensor technology or the exact failure response.
Common causes
Most likely first.
- Dirty sensor surface
- Sensor misaligned after a frontal impact
Symptoms
- Adaptive cruise control or forward-distance warning may be unavailable
- Cruise control may be disabled or may not maintain following distance
- Driver-assistance warning light or message may appear
How to diagnose it
- Check freeze-frame and driver-assistance data for the left sensor's reported status and any related alignment or sensor codes.
- Inspect and gently clean the left front sensor surface using the vehicle manufacturer's instructions, then check for ice, dirt, damage, or an obstructed view.
- Inspect the left sensor mounting and surrounding bumper or grille for looseness, impact damage, or signs of misalignment.
- Check the sensor connector and wiring for loose pins, corrosion, or damage.
- If the fault remains after visual checks, use the manufacturer's scan-tool procedure to assess left-sensor data and verify alignment.
Common fixes
- Remove dirt or other obstruction from the left front sensor surface.
- Secure a loose left sensor mount.
- Repair damaged wiring or connector terminals at the left sensor.
- Have the left sensor alignment corrected after impact or mounting repair, following the manufacturer's procedure.
- Replace the left sensor only if testing confirms it has failed.
Can I keep driving?
Do not rely on adaptive cruise control or forward-distance warnings while this fault is present; drive manually and leave extra following distance. If the system behaves unpredictably, switch it off and have the left sensor checked.
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.