CEL came on, had it checked for codes. Codes came back P0491 and P0492 for the Secondary Air Injection System (Banks 1 & 2). I know this is for the secondary air pumps and could be a leaking or broken vacuum line.

I am looking for a diagram of this system to troubleshoot the lines and see if I can pinpoint the cause. If I am able to identify the culprit, I would like to know exactly what I am looking to replace so I can order the correct part.

Any diagrams and part numbers would be appreciated.

Thanks
Chris