Hi, over the past couple months my 94 ram has been throwing a code 32, egr valve open/shorted, air/fuel mixture not changed during diagnostic test. Also, last week I got my truck emissions tested. It passed with HC being 0.23 with a standard of 2.4; CO being 4.05 with a standard of 25; but NOX 3.27 with a standard of 4. All the numbers are in grams per mile.

Do you think that the low CO and HC with the high NOX are related to the fault code? I am hoping that the egr is stuck closed, but how can I test the egr's functioning?