Ecu Codes 12 And 23

[riceburner5]

does anybody have a picture of a knock sensor on an h22a engine or a very good description and location of it. also any suggestions on the ecu problem code 12 (egr:exhaust gas recirculation lift valve). is this wiring or the egr itself. pls. help and thanks in advance.

 

[dohcvtec_accord]

It's one of the only sensors on the back of the block, it's kinda below and to the right of the oil filter.