Chevrolet Repair: 99 Chevy Malibu, chevy malibu, egr system

Question
This is a 99 Chevy Malibu 3.1..This morning the check engine light came on. It gave me 3 codes. The first one was 171 system to lean, 410 Secondary Air Injection System, and 1404 EGR system. Could these be linked the the same issue and what could be causing those codes? Thanks a lot.

Answer
Hey,

 The could be a problem with the pcm if they came on all at the same time.  Clear them, drive it at least 5 cycles and check again.  Be prepared to check codes the second the light ocmes on.  Never attempt to  fix code issues if you don't know how long ago they came on in history.  It could have been months ago.

Wayne