Car Question: Honda CRV 2005 Knock Sensor

I bought an OBD2 code reader for the 2005 Honda CRV and it shows P0325. On lookup it's an issue with the "knock sensor". Half the time the engine light comes on and half the time not - which is the reason I picked up the code reader. The car is running just fine. How important is it to replace the knock sensor? Perhaps the problem is just a loose connection to the knock sensor? Other thoughts? I see it's generally about $400 to replace $300 labor and $100 part.
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amigan_99Network EngineerAsked:
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JohnBusiness Consultant (Owner)Commented:
The knock sensor detects engine knocking from high usage (ascending a hill), or gasoline which has too low an octane rating (regular is 89 octane and may not be enough).

Excessive knocking is harmful to the engine. It will be cheaper to replace the knock sensor than an engine.
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amigan_99Network EngineerAuthor Commented:
Thanks so much John. And expert on so many things!
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JohnBusiness Consultant (Owner)Commented:
Thank you for the kind comment and you are very welcome.
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Tiras25Commented:
Agreed with John.  Try running a higher octane gas.
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