whats up, my wife has a 2002 maxima and I am amazed every time I open the hood. I only change the oil and filter in mine.
there is so much wiring and computerized shit in there , I would say bring it to a dealer or shop that has the computers and diagnostic tools to find out what may be wrong , I def. have an extended warranty plan on mine. keep checking back , someone might of had the same prob. with thier car and can help you out, sorry I cant help you