Ok, if a car has an oil leak and you can see the running on the bottom of the car on the oil pan and trans will it fail. It's not spewing oil everywhere it has a valve cover leaking and has just not gotten fixed for a while. Also I read that the Check engine like is recorded and not a automatic fail? Is that true? I got that off the emission web site I know the the cel means emission failure in the car but, doesn't mean it will fail the exhaust test.