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Got an error code for a knock sensor on my 5th gen h22 and was going to replace the sensor but can’t seem to find it. Where is the location for the knock sensor on an h22 base model?
 

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I have an SH, and not sure if they are in a different place or not. On mine, it's just below where the head contacts the block, on the back side, middle of engine. I broke mine once by accidentally hitting it with my intake manifold when I was re-installing the intake with the engine in the car. Check www.hondapartsnow.com for the sensor and find it on the exploded views.

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SH blocks and Base blocks are cast differently to allow for the atts. rear of block near head and oil filter cooler. i believe its green.
 
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