B2909 refers to the Passenger belt tension sensor, specifically a wire to it could be open or grounded. In 99 percent of cases, the circuit has a problem that must be diagnosed. The computer has to be working to detect the problem, so there is no need to replace it. In a very rare one percent of the time, a defect inside the computer can cause it to falsely set a fault code. The computer is only suspect when testing shows there is no defect in the circuit.
I still don't know what is meant by "bladder". If that refers to one of the air bags, those are only replaced if one has been set off in a crash.
Friday, January 20th, 2017 AT 7:41 PM