Help improve MustangCarFacts

Suggest a correction

Spotted something incomplete, disputed, or wrong? Send the details for private review. Strong sources help, but firsthand recollections and research leads are welcome too.

About this page EGR & Secondary Air Codes https://mustangcarfacts.com/codes/groups/egr-air

Your response goes to a private owner inbox. Nothing is published automatically. Text and links only—no file or image uploads.