After driving 200 miles my engine light cane on. Manual ssys exhuast valves is this an easy repair.

What testing did you perform from the diagnostic trouble codes? "Exhaust Valves"(although not sure what you're planning on doing with them?) are not an easy fix on any car. However, no code nor manual can tell you that you need to do anything with your exhaust valves -- it can only tell you an area to perform testing in to pin point the source of your troubles.