PCM Bad?

How do you check to see if the PCM is good. I'm told it is bad. I have a hypertech programmer (which the pcm responds to) , no scantool or software. Should i use something like lt1 edit or a scantool?

If the car runs then the PCM should be fine.

Can you tell me about failed emission NOx. Cat is new, EGR is functioning.

Don't know where to turn...... :confused:

Did you let it warm up enough before the test?

Are there any other known issues with it? Does it run well?