Hi S - error codes

[SUSIEKING1964]

HI! I have a 1997 Ford Explorer, I have 3 different error codes which are PO443, PO453, & PO401. It keeps acting like it's going to go dead at times when stopped for a minute. Can you help?
I can't reply to you. When I tap reply it won't do anything. Yes I think they all did appear at once. Is it a major problem?

 

[C420sailor]

Did they all appear at once?

First two point toward a bad purge valve.

Last one is EGR valve related. Could be a cracked vac line, busted EGR diaphragm, dirty EGR valve, etc

 

[dvdswan]

Welcome to the site.