I went in for an emissions test and my 96 mercury marquee failed on too high of a NOx level.Can someone please?

tell me what this could be caused from? My check engine light came on too.

The reason you go to these places is so they can tell you how well it runs and what is wrong if you have a problem. Many times it can be as simple as a bad gas cap to a bad catalytic converter. I don’t know where you took it but they should have told you what was wrong from the test.

One Response to “I went in for an emissions test and my 96 mercury marquee failed on too high of a NOx level.Can someone please?”

  1. The reason you go to these places is so they can tell you how well it runs and what is wrong if you have a problem. Many times it can be as simple as a bad gas cap to a bad catalytic converter. I don’t know where you took it but they should have told you what was wrong from the test.
    References :

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