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Just what it is called. It Senses knock/Ping/Valve Clatter.Sometimes Caused by poor fuel / Bad Gas/Incorrect Timing. The sensor senses Noise/viberation then tells the computer to correct the timing retarde/advance. It is usally mounted on the lower part of the engine block right side. It looks like A temp.senser BUT larger with A single wire at the top.Good Luck Darwin B

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โˆ™ 2004-08-24 22:30:12
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Q: What does a knock sensor for a 2002 Pontiac Grand Am do and where is it on the car?
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