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Glow plug ckt fault code po678

7K views 2 replies 2 participants last post by  justinmix 
#1 · (Edited)
The other day I got CHECK ENGINE SOON light.
So I did, the obd2 reader said (PO672-674-676-678).
This is cylinders (2-4-6-8) right bank,glow plug ckt fault per book.
All my fuses are good, tested them all.
The 9 pin connector to the valve cover is tight no bare wires.
No Loose wires. i need some instruction.:icon_ford:
Truck is 2000 f350 crew 4x4 7.3l 125,00mi.
 
#2 ·
I'm confused. What year/engine do you have? I'm guessing a later 7.3 since you mentioned a 9 pin connector. You must have a CA emissions style engine that uses a glow plug module, instead of a glow plug relay. If this is the case sounds like your glow plug module might be taking a crap.
 
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