Toyota Avalon warning light for headlight leveling system with sensor replacement and electrode repair on Toyota Avalon

Some Toyota Avalon owners report experiencing issues with the headlight leveling system, indicated by a warning light on the instrument panel that requires prompt attention to ensure proper headlight functionality. These owners may find that a malfunction in the system necessitates sensor replacement, as sensors are essential for leveling the headlamps and adjusting the light output. Additionally, some report that electrode problems can trigger the warning light, impacting the system's performance. Persistent warning lights often lead owners to seek professional inspection from a Toyota dealer for accurate diagnosis and necessary repairs. While some owners attempt DIY testing of sensors and components using batteries and a multimeter, complex issues are best handled by professionals. Common symptoms of malfunctioning headlight systems include dashboard warning lights, aiming problems, leveling issues, and flickering headlights, which can help identify specific problems within the system.