alright im new but .a couple days ago i brought a 97 honda civic hx for 1600
.he said all it needed was a new 02 sensor and i brought it home and code p1509 and p0135 .went to pick n pull got a iac valve and made it run shittyer .so cleaned the old one really good put it in and it runs pretty good .tried to clear the code but it wouldnt clear.tried reseting ecu by batter and fuse .when the car is idleing i unplugged the iac and no change in idle .im not to worried about the o2 sensor i got a new one just got to get a jack to install it downstream.but main problem is the iAC and its getting really annoying .so any help

 

This is the Accord section. Try posting in the civic section for some actual feed back. Welcome to HT