For vehicles with the lamps on reminder light, it comes on when the lights are in use.
Crankcase Ventilation System Description Emissions PCV
General DescriptionA crankcase ventilation system is used to consume crankcasevapors in the combustion process instead of venting them toatmosphere. Fresh air from the intake system is supplied to thecrankcase, mixed with blow by gases and then passed through acalibrated orifice into the intake mani ...