Not all warning lamps are included in the check, e.g., high beam headlights and direction indicators.
If a trailer with LED lights is connected to the trailer socket, the lamp check may not be performed.
A warning lamp check is initiated when the vehicle's ignition system is switched on. The check lasts for 3 seconds, except for the airbag warning lamp which remains on for 6 seconds. If any warning lamp remains on after this period, investigate the cause before driving.
Some warning lamps have associated messages displayed in the instrument panel.