| I had the P0443 Evaporative Emission System Purge Control valve Circuit code on my 96 Z once. I actually had it at the dealership they suggested replacing the Purge Control valve even thought they tested it and said it successfully performed on a bench test. The tech at the dealership had disconnected vacuum lines etc trying to see if if something was not hook up correctly as well. Of course they reset the ecu afterwards. The code never came back even though I bought a new purge valve, about $130.00 from Nissan, and never installed as the code did not come back Some time later after doing some work under the hood myself the code came back along with a MAF code. Thinking I may have bumped a line I went back in and made sure all my vacuum lines were connected securely. Cleared the codes and it has not come back since. I would double check all your vacuum lines pertaining the emission system by pushing them into what they are connected to. If all the lines are secure you may end up replacing the Purge Control valve Circuit. I've been told by others they do and can go bad. Regarding the P0325 knock sensor - are you having safety boost problems? Code P0325 is essentially the same as Code 34 I believe. Code 34/P0325 could mean a faulty detonation sensor or circuit, but it does not mean that detonation actually occurred. If you end up needing a new knock sensor you may want to look into a temp relocation kit under you have other major work needed to properly mount it in the correct location. Sorry I don't have much for the P0300.
 96 TT QN0/G
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22:36:15 06/25/13
