i was working on my car last week and when i finished my CEL came on and it threw code P0411, secondary air injection incorrect flow. i didnt think much of it cause i was working on stuff and figured i just bumped something loose so i had the code erased and it didnt come back...until today. i was driving home from work and it came back on again. i had the code read again and its throwing the same code. does anybody have any idea what causes this code? the little printout that autozone gave me says it could be a ...
1. circuit relay or open fuse
2. connector or wiring
3. air pump or hose blocked

so i guess my real question is where are all these parts located and how do i go about checking them for proper operation? obviously i will see if their are any fuses blown, but other than that i dont really know where to start. i also dont have a manual so i dont even know which fuse it is, but i'll just look for any that are bad. any help would be great.