2002 Honda Civic Si (EP3) So i put in new oil, changed the spark plugs (NGK), poured out old gas and poured in 91 chevron gas plus added some of the injector cleaning liquid (because the car was not running for about 9 months) Changed the Knock Sensor, checked if the knock sensor wire was working properly (checked it from the knock sensor to the computer (ecu)... everything is fine) the timing chain is on point and its running good. one thing is that the pully or what ever its call right under the tensioner, sounds like the bearing is making a lot of noise. could that be the problem? check engine light still on P0325. need help asap..

 

under your tensioner is the water pump, those do make noise.. as far as the code goes thats the knock sensor code which u can have a bad sensor, those are notorious for going out, i even shut mine off thru kpro cuz i wasnt gonna spend another 50 bucks on one to have it just go back out again.

 

I also had a knock sensor go bad on me once before. But since I'm boosted and I tune for knock I replaced mine because it's important to me...