Why is the on board computer functioning but wilk not read on scanner

What is your question?

The engine control module is suctioning that it will not read up on a scanner and tell me what's wrong with the vehicle is skipping a misfiring or something and I cannot pass emission test of my lights won't go out bright lights on the engine light is on ABS light ones and we just replace all brake. Hi the 97 models are just got a lot of sweets.

What makes this problem better or worse?

Worst cannot pass emissions because I cannot get on my lights to go out and getting to ready mode

How long has your 1997 Dodge Dakota had this problem?

2 weeks just bought the truck 2 weeks ago it only has a hundred eighty thousand miles on it other is very strong when your oven if you have a 40 it runs good