FixVault

DTC Detection Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U0164 Lost communication with Unified meter and A/C amp. When ECM is not transmitting or receiving CAN communication signal of OBD (emission related diagnosis) with Unified meter and A/C amp. for 2 seconds or more.
  • CAN communication line between Unified meter and A/C amp. and ECM (CAN communication line is open or shorted)