how hard is it to fix?the car was already warm.
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2003 Ford Expedition Question: htd catalyst,sec air system,ac refrig mon are on my tester are they related?
Answer #1rpclements April 02, 2012, 11:30Journeyman
Could be. Sounds like this one built for California emissions. Maybe problem with your air pump.
Replywhipnboy, April 02, 2012, 16:53Rookie
how do i find out and begin to fix it?
Replyrpclements, April 02, 2012, 17:42Journeyman
Well did the codes all come up at one time or were the problems stacking? I'd start with problem with secondary air injection system. Check all hoses around air pump. Air pump may also have simply blown fuse. If this one not working will effect the catalyst efficientcy.