Does your car come equipped with a phone in the center console? If so, does the phone have a SIM card? If not, try to turn off the phone. If the light stops, then this was the issue. I have the same issue, but I can't remember which light flashes. If it is the phone, then I guess the only way to resolve the issue is to get a working SIM... unless you ofcourse are willing to turn the phone off every single time you turn on the ignition.
Let us know how it goes.