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DTC Detection Logic

WARNING: This page is about a different car, the 2010 Infiniti G37. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION CONDITION CHART

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)
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