check eng. light
 

My 03 has 115k on it and the check eng light comes on intermitt.
I had the code pulled at Auto zone and was told that the code was for a malfunction in the elec. circuit for thr vent control in the evaporative emission control system.

Could someone tell me wher to look and the fix.
I worked as a line tech. in the early 90's and understand one end of the screw driver from the other.