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Message: <blockquote data-quote="I_LIKE_TURTLEZ" data-source="post: 1556929" data-attributes="member: 31555">Pulling the cover just to look at the timing marks is extreme, you should diagnose the more likely components first. Especially since removing the serpentine belt got rid of the noise.-Checking wire continuity is a virtually worthless test, just because a wire is technically intact doesn't mean it's capable of carrying the required load.-You need to follow the code & verify every wire going to/from the crank/cam position sensors(preferably with an oscilloscope handy).-You created more problems/unknowns by replacing OEM parts with aftermarket junk, new doesn't mean good. Never buy anything but OEM sensors.Pay the small nominal fee for Ford's service data & it will provide what we call a "trouble tree" that takes you step-by-step for your code, you can skip any continuity tests though..Since this apparently started after your dash removal I would also revisit that, it is possible you pinched/damaged something.</blockquote>