P2001 Dodge -

Question

Where is this and how do you check it?

Answer 1

P2001 Nox trap efficiency below threshold Bank 2

The 02 sensor should be replaced , it can be related to increase sooting , Dodge has produced a updated 02 sensor  this is for the front 02 sensor. Also check to see if the Recall update has been performed for the exhaust regeration for the ECM. in the underhood there should be a authorized modification label, If not have the Recall performed Recall # J35.