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Can a leaky exhaust manifold trigger a knock sensor

Hey Guys,
First, a little background. I just got a 2007 F-150 Harley with all wheel drive which developed a exhaust leak on the right side manifold, then shortly after the little engine light came on the dash. I was by an Autozone so I stopped in to have it diagnosed and they said it was a knock sensor. Could that leak make enough noise for the knock sensor to go off? Thanks for any insight.
Dan
 

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