i need to konw where the knock sensor is on a 99 civic hatch dx i know they dont have one i just want to know if there is like a hole for one and if so where i can find it also do i really need one? i mean what does it do?

 

Yes, they have a hole for it. It's at the top of the block on the back side above where the oil pressure switch/sensor is. No need to put one on your stock setup; your ECU does not even support it. Honda did not feel they needed to put one on so I'd say you'll be just fine.

 

the thing is i did a mini me swap and the check engine liight is on its saying that i need one

 

OK, so you should add one. You omitted that you now had a VTEC head and, more than likely, a P2P ECU that requires a Knock sensor. Yes, add one.

 

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