What causes the airbag warning light to frequently turn on?

Korando's engine warning light frequently turns on.

The oil warning light comes on when I brake hard. Sometimes the oil light just turns on!

Long press the lock button, the yellow light turns on, causing all the window control buttons to malfunction. What should be done?

The 2005 Nissan Quest's passenger airbag light turns on when someone is seated and turns off when no one is seated. What could be the reason for this?

What does it mean when the ABS warning light stays on?

Does the Accent have a feature where the warning light turns on if the seatbelt is not fastened?

I have a 2017 MG GS and the airbag warning light sometimes turns on. It lights up occasionally, especially when going over speed bumps. Has anyone else experienced this issue?

What could be the reason for the Scirocco 2.0 engine warning light to turn off and then come back on again?

The car is a 2015 model and has run 99,000 kilometers. The warning light turned on, and you replaced 4 ignition coils and 4 spark plugs. After some time, the light came on again, and the engine shakes when starting, but it's still drivable, though the light remains on. What's causing this issue?

What causes the airbag warning light to frequently turn on?