I am having this same problem and have been fighting with Nissan. Their Conumer Affairs Dept. is the worst. I will never buy another Nissan product again after all of this. Woodfield Nissan flat out lied to me also. Went to Autozone, they ran a scan, P0328 of course, took it to Woodfield Nissan in Schaumburg IL and they ran a test, "claimed" there was no code and I found a print out under my hood with P0328 from the dealership 2 days later!! Bastards flat out lied to me and charged me $107.

Might try to fix this myself this weekend. Let me know what you guys find out.