Hi Guys, I need some help here.
I wiggled the connector on the outside of the left valve cover harness to check it for tightness. The next time I started the engine it threw a code. It is P0678, Cylinder8 Glow Plug Circuit. Does that mean it is in the wiring, or is it just a coincidence and the glow plug went bad when I wiggled the connector? It has never thrown that code before and has 95,000 miles. Thanks for any help.