This is an indication that there is a fault present within this system. These require specialised computer scanning and repair. You should be aware that specific faults do relate to warrant of fitness and safety issues.
Engine light stays on
eg. running rough, hard starting, miss-firing.
Battery light stays on
eg. hard starting, overcharging, undercharging, low or no charge or battery fault.
SRS/Airbag light stays on
NOTE: Airbag system will not operate while this light is illuminated. In the event of a vehicle accident/crash - the Airbag system will not deploy.
ABS light stays on
NOTE: ABS system will not operate while this light is illuminated. Car brakes will lock up during heavy breaking while system remains inoperative.