Have worked on several electrical problems on a 2002 Buick Regal - LS. Starter, ABS, electric windows.

Over half the time I have started the car in the last month get a solid AIRBAG light. Sometimes it goes out after the initial lamp test sequence and sometimes it does not. No codes set.

What do you suggest I look for?

If that light came on, you have a code set, just can't read it.....SIR are "B" codes...most scanners/readers can only read "P" codes...