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03-21-2007, 09:03 PM | #1 | |
AF Newbie
Join Date: Feb 2007
Location: Armada Twsp., Michigan
Posts: 18
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2000 7.3L throwing PO478 code
My ses light came on . I'm running a superchip on the lowest setting I think its 70hp for a year now . It has 134K miles on it and runs great. The PO478 code reads Exhaust Pres Ctrl Valve High Output. Its also throwing a PO470 code which reads Exhaust Back Pres Sens Circ Error. Has anybody dealt with this before?
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