Glow plug circuit code - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 04-29-2009, 10:15 AM Thread Starter
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Glow plug circuit code

I was trying to chase down a miss. I wiggled the connector on the outside of the left side valve cover to check it for tightness. The next time I started the truck the MIL came on. The code is P0678, Cylinder 8 Glow Plug Circuit. Does this mean there is a problem in the wiring circuit, since it showed up immediately after I wiggled the connector, or is it just coincidence and the glow plug actually went bad when I checked the connector on the valve cover? Thanks for any help.

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Last edited by johns4dor; 04-29-2009 at 10:16 AM. Reason: misspelled words
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post #2 of 2 Old 04-29-2009, 10:30 AM

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clear the code and see if it comes back

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