started the truck up and as usual all the gauges and idiot lights are going through their self checks but for somereason the airbag light stays on steady. drove to where i had to go with it still on, shut the car off and back on, the light is still on. i havent done any recent work on the truck. just suddenly illuminated now im assuming the airbag system is the same as the ABS system, meaning that if the light is on, the system is malfunctioning and will not operate in the event of a collision???? i dont have a scan tool, is there any way to pull a code to see if a sensor is bad?