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Forum > General Smog Check > Question

will my 91 Nissan Maxima pass the smog?

The check engine light turns on, i believe its a bad sensor because it stays on for a couple days and then it turns on for a day or two.Should i still get a smog check?
Answer:

No... Do not get a smog check... Even if the light is off when you plan on taking it in. Chances are the faults which trigger the check engine light on and off also stop the related readiness flags to set. Readiness flags are certain emissions systems "self-tests" which must be performed inorder for your vehicle to pass the test. We recommend you get an emissions system diagnosis first... Find out what is causing the light to illuminate and then move forward. posted by SmogTips Support

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