Why would I have an alert going off without a light to notify me of the concern?

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your vehicle. It sounds like the alert you're hearing could be linked to the lane departure warning system. The fact that it happens when changing lanes suggests it could be a normal function of this advanced driver-assist feature. Sometimes, sensors can become dirty or misaligned, causing the system to give false alerts without triggering a warning light. Checking and cleaning your vehicle's cameras and sensors may help, or there could be an intermittent fault in the wiring. If the dealership scan didn't show any issues, it may require further diagnostic work to test those systems while driving. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!