ecm

would that make the theft light come on .i changed the sensor had the comp reset. it still comes on .so does the batt oil low traction abs ect. the theft light comes on with the car running. 1996 grand am. in the morning the theft light is on and the car just cranks.sometime it starts with the light on

is it an after market theft alarm??
or oem/stick

factory theft system. got sensor from pontiac