I was sitting in traffic yesterday-stopped in 2nd, with clutch in-the chime sounded. I did not have the turn signal on-I wonder if it was because I was sitting too long with clutch in-baye I was easing off a littlke bit-but had not noticed RPM drop-construction delay was reason-probably 5 minutes-it was not hot, and oil pressure looked good. The only code is P0630 VIN Not Programmed in PCM, which has been in there since the dealer enabled the passenger side airbag switch-I think that is how they were able to do it because the ECM could identify quad cab config from VIN, and wouldn't allow switch to be enabled. Is there any way to see why the chime sounded? Is there a list of what can cause it to chime?