4.8t

i have a bunch of code. some i know why others i don't. its a 97 2dr civic with a jdm h22a swap. computer is a usdm p13 obd2. i'm wondering if a bad knock sensor could cause random misfire codes.

code 12 egr: its removed no big deal
code 65 second o2 heater: its removed too i believe no big deal

now the ones i don't know.

code 23 knock sensor
codes 71,72,73,74 random misfire. yet idles and seems to run smooth.