I own a 2002 Honda accord ex 2.3l 4cyl manual. I have tried everything with this knock sensor problem. I changed the knock sensor with a new oem from the Honda dealership. Checked all of the wireing the best way I know how. I can not get cel to go out only thing I know to do now is change the ecu is there anyway to check the ecu? Or is there something im missing could anyone spare some advice would be greatly appreciated thankyou in advance

 

Are you able to do some checks from the ECM/PCM C3 terminal and the knock sensor?

 

Yea i can do any kind of test. What test would be good to help me rule some stuff out?

 

From C3, basically you disconnect the knock sensor and check for continuity to ground - should not have it.

Then use a jumper and ground the wire that goes to the knock sensor and retest for ground at C3 - it should have ground.

While you have the wire off - be sure to check the condition of the connector.

 

Thankyou for your help I will try this and get back to you with the results

 

Did anyone find what was putting this fault up I have a k20 crv and traced wiring which was good also run another wire and changed sensor but still have this fault after a min of driving on the road!

 

I just had this problem solvedddd!!!!!!!!!!!
Important P0325 is the knock sensor code but dont buy a cheap one, or any aftermarket one go to he junkyard and get an OEM TRUST ME

 

spent endless hours and cuts to my wrist checking wiring and changing sensors! Cheap eBay £13 item and a Euro carparts £60 item neither worked and gave 0.02-0.06 volts at idle and at max 0.20 volts when rev’d but then it knocks the sensor out as it’s not reading as it should and reverts to mapped timing and 0.00 volts. When replaced with a Honda £114 inc vat, the light stays off and my readings are 0.20 - 0.40 on tick over and 3. Odd volts when rev’d I checked this on my diagnostic machine for a nice graph reading and also seeing timing advance + vtec switching in. I searched for a longtime and couldn’t see anywhere that told me what voltage readings I should be getting on a Honda knock sensor so I hope this helps you guys in the future.