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I was getting ready to take my son's car for emissions/safety inspection and I realized his airbag light is on.

Any suggestions on next steps to verify there is a problem, or what steps to take to fix this?

I tried to verify the light was actually warning me since my son started wrenching a little bit. I tried using a OBD2 reader at Autozone, but it just told me '1 code' and '5 codes' - not what the codes were, nor any details. I also tried using a fancy Bluetooth OBD2 reader with some phone apps. A couple apps gave some info on performance info, but no apps gave me info on error or fault codes.

I have a feeling this won't pass an inspection - and may not be safe, if left alone - I appreciate suggestions or directions immensely.