09 800 Dragon Knock Sensor Ghosts

Like2GoFast

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The check engine light comes on only when heading down the lake at between 5000 and 7000 rpm, and the computer puts the engine into safety mode. Shut sled off, and then restart to clear the fault. Dealer checked fault codes in the computer. Keeps coming up knock sensor. Had the knock sensor replaced. Still happening. Dealer can't figure it out. Anybody out there have any similar issues? Any insights as to a fix?
 
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