Smitslex

To make a long story short, i bought the car with the airbag light on. The dealer i got it from paid the lexus dealer 2500 to installed a airbag harness and it still did not turn the light off. After installing the harness the code read passenger seat occupancy sensor. I'm not sure, i seriously think lexus is full of ****** and possibly unplugged something, is there anyway i can fix this myself and maybe check connections or plug something in that could turn it off? Anyone experience the same thing? My ODB2 does not read airbag codes or i would actually pull the code up myself to see if the dealer is not lying. My dealer sucks *** up here and they are full of ***** ripping people off. Any help would be much appreciated .