Well at first my check engine light came on.. EGR valve hi/low was the code.. I cleaned out the EGR valve, changed pcv, hoses, and fuel filter.

I reset the ecu and the code turned off for a good month. Then the code came back on saying the same thing. So I just purchased a brand new EGR valve. I then reset the ECU again. A week later it comes back on. I changed out all parts connected to it and that have to do with the fuel system. I tried disconnecting the battery over night. That only worked for a few days.. I took it to my friend at Nissan and he said nothing is wrong with my EGR valve or fuel system. Now I'm lost.


Do I have a messed up ECU? What are your thoughts.

Thanks,

 

look up the code here http://forums.maxima.org/showthread.php?threadid=235667 , and see if that helps