Someone told me about a tip. By using pledge you can clean the inside and outside of the car without damage. I fastened all the belts and the light was still on. I did notice the the back seat clip was tucked under the seat. I pulled it out then cleaned the seats with pledge, started the car and the light was out. This was not the first time to clean the seats this way. The next morning the light came back on. I check the clip again and the light was still on. There was nothing on the seat to trigger it. I never had this problem before.
my seatbelt light saves on and will not go off. on 2012 Nissan Murano
It would have to be scanned, the dealer ought to check it for you from a warranty aspect.
POSS WARRANTY ITEM