Ignitor problem

When trying to ignite burner 1 there is no spark at burner 1 however burner 2 sparks instead. Burners 2 & 3 work fine with there own control and although burner 2 sparks it will not light with the burner 1 control as the gas flows as it should with each control. I’m not sure if it would be the switch at burner 1 or the control module for all 3 burners. Any idea?