Troubleshooting > 66P APER SENSOR ERROR CODESCODE # LOCATION CODE # LOCATION370 Duplex 390 MP Tray371 Duplex 391 Paper Tray372 Duplex 392 2nd Paper trayaa. If fitted.380 Paper feed 400 Paper size381 Paper path 409 Face up stacker(sensor not shown)382 Paper exit392381 380, 400390372371382391370