What might illumination of a check engine light indicate before an inspection?

The illumination of a check engine light typically serves as an early warning indicator that there may be an underlying issue with the vehicle. This light can signify a variety of potential problems ranging from minor issues, such as a loose gas cap, to more significant concerns that might affect the engine's performance or emissions. Before an inspection, it is crucial to address the check engine light, as it may indicate that there are diagnostic trouble codes that need to be resolved or further investigated. Ignoring this warning could lead to failed inspections or unsafe driving conditions, emphasizing the importance of having the vehicle checked promptly when the light activates.