Air bag light stays on all the time.What are the causes
Low voltage, Clock Spring and passenger seat mat.
What u need is an airbag scanner that can read the trouble codes via the obd2 port under the dashboard.
If the codes are stored status then you can clear them. If codes are present you will have a good idea of what is wrong.
This can either be a small issue with the LED or a much more critical issue with the complete sensor of the ABS. I recommend you to use a scanner and get this sorted out, as the above mechanic pointed out.
If this is not fixed, it can become a life-threatening issue.