The message indicates an issue within a vehicle’s Daytime Running Light system. These lights, typically LED, halogen, or incandescent, are designed to automatically illuminate when the vehicle is running, enhancing visibility during daylight hours.
Proper function of this system is vital for road safety, making a vehicle more conspicuous to other drivers and pedestrians. A functioning system can contribute to accident prevention. Historically, the implementation of such lighting systems has been shown to correlate with a reduction in daytime collisions.