Code U1511 00 Definition Interdevice Dedicated Bus Lost Communication With Device 1 Description The system voltage is between 916 V Cause U1500 01; What Does Code U0121 Mean? Joined 669 Posts #5 Cobrajet said Same problem for me, code U1510 show with my OBD reader Dealer have more specific code that guide technician to the active grill shutter The wiring near the grill motor was dommaged by corrosion Corrosion on a 2 years old car
U1510 Code Cadillac