DTC Codes B1491 & U1073, need help fixing
 

Hi got a 2006 2.4L Mitsubishi Galant with around 120k miles and i the SRS light just recently came on. I had the car scanned with a computer and tried clearing the codes but they come back instantly. I also tried disconnectiing the battery for ever an hour but still get the codes. Im getting DTC Codes:
B1491 Passenger Airbag (2nd Detonator) Open Circuit
U1073 Bus-Off

i searched google but didn't find much on it. Does anyone have any suggestions on what the problem may be?