If the nuetral safety switch is bad will it cause the Check engine light to come on? The Jeep is a 1996 SE, The switch has been replaced and everything is doing what it's supposed to. I'm really trying to make sure something else didn't cause the light to come on. There was a few issues that we addressed at the same time. So if the NSS doesn't cause the light to come on, I'll know to watch for something else to light it up again. Thanks in advance.