See 07 Nissan Frontier Color Options, Color Chart, Color Codes and Interior Colors for XE, SE, Nismo, LE 07 Nissan Frontier Color Options, Codes, Chart & Interior Colors Change Year Compare Vehicle 21 19 18 17 16 15 14 13 The codes U1000 and U1001 normally indicates a control unit communication or failure To determine the which control unit that is not communicating or has failed CAN diagnostics is performed with a advanced level scanner U 1001 CAN communication line This means the ECM is not transmitting or receiving CAN communication signal other than ECM Here is a link http//enginecodes/com /u1000_nissan
U1000 Nissan Can Communication Line Signal Malfunction
