How to pass emissions? on 1993 Dodge Caravan

My van failed emissions due to a high CO (20.03) and a high NOX (4.42). How can I get these numbers lowered in ordered to pass emissions.

Asked by for the 1993 Dodge Caravan
1 answer
There is no way to know without testing the vehicle. You could have a problem with a sensor, wiring, computer or catalitic converter.
You will have to have the vehicle tested by a knowledgeble tech.