The engine was hesitating/misfiring around 1500RPM and had a knock sensor code. Replacing the knock sensor may have helped a little bit, but not much. Replacing the fuel filter and putting some HEET (red bottle) really helped!!
See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how
frequently 2000 Nissan Altima problems occur, check out our car reliability stats.