View Full Version : code 34 again

08-30-2006, 02:35 PM
I know it has been asked before and I did do a search, but I'm not really sure what to do anymore.

I get a code 34, knock sensor circuit error. I have a 1995 240sx (s14) with an sr20det (european model, but I guess they're not much different).

I did do the following tests and they same fine

The 1st test gives me value of 900+ and the 2nd gives a value of 0, which, I am told, is correct.

A voltage test on the plug (not the ecu side) gives me value of around 3,3v.
I did read this thread and charlie2020 comments http://www.zilvia.net/f/showthread.php?t=107394&highlight=knock+sensor where he says it should 5v at the ecu. Would it then also be 5v at the plug ?

If so, could the error be caused because of the 3,3v ? and why ?

08-31-2006, 08:46 AM
I have also heard that if tighen the KS too tight, it will retard timing. Is should be something like 6 ft lbs er something like that.

08-31-2006, 09:39 AM
Never touched it (you cant even see it from the top) since I bought the car 4 years ago.
So I don't think the problem lies with tightening ;)