What's the Chevrolet Aveo error code 24?

On the Chevrolet Aveo (also applicable to the newer Chevrolet Sonic), an error code of 24 shown on Your dash display indicates a failure of the license plate illumination bulbs. Contrast this to a diagnostic trouble code (DTC) that requires an OBD-II scan tool to read, this is a straightforward reminder from General Motors that You need to swap out the bulb. One reason for the "in Your face" reminder is that we rarely lay eyes on our license plate bulbs, since they're normally only on when You're in the driver's seat. This one's particularly important to them, though, since failure to have an illuminated license plate can lead to tickets and fines; the gentle service reminder lets drivers know that they're running the risk if they don't make the repair soon.