Symptoms
- Lane departure icon lit or a message saying the system is unavailable
- No steering assist or lane warnings while driving
- Sometimes appears in heavy rain, fog, or glare
Likely causes
- CommonWindshield camera blocked by dirt, snow, or a stickerThe camera near the rearview mirror needs a clear view of lane markings.
- CommonFaded or missing lane markings on the roadThe system can't detect lanes if the road markings themselves are worn away.
- PossibleHeavy rain, fog, or glareReduces the camera's ability to see lane lines reliably.
- PossibleWindshield replaced without recalibrating the cameraMany systems need recalibration after any windshield work.
- Less commonCamera or module hardware faultLess common but possible with age or after a collision.
What to do
- Clean the windshield around the camera area, usually near the top center by the mirror.
- Check for anything blocking the camera's view, like a sticker, dashcam mount, or ice.
- Note if the issue happens mainly in heavy rain, fog, or on roads with faded lane lines.
- If the windshield was recently replaced, confirm whether the camera was recalibrated afterward.
- Have a shop recalibrate the camera if a windshield was replaced and this wasn't done.
- Have the system diagnosed by a dealer or shop if cleaning and clear conditions don't restore it.
Tools and parts
- Glass cleaner and soft cloth
When to call a pro
See a dealer or shop for camera recalibration if the windshield was recently replaced or the system stays unavailable in normal driving conditions.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.